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Description
EDIT// Thank you The-Royal-Ink for offering to color, line and everything else on the reference for me! It looks amazing! ;v; So it's what I'm using from now on.

EDIT #3// Added and updated her information.

There! Finally got around to update Ally's reference sheet from the digital 2014 one. So, I hope this helps a lot!

Plus, that old reference sheet was making me cringe a little due to my lack of proper anatomy.

Also please read the backstory/history link below. It explains most of the things involving her powers, her death and her overall relationships with characters. This is only a summary/reference!

Though thank you all who supported me and her ;w; It's honestly very surprising!

~Ika

So here is a revamp of an old deviant of mine of Ally's reference. xD
Along with information:

Name: Ally
Real Name: Adeline Abendroth (from past life)
Nicknames:
Slender Doll
Ally-Doll
Nightmare Puppet
Victorian Ghost Child
Nightmare Bringer
Wind-Up Child
Operator's Doll
Operator's Puppet
Age: 118 years of age (Looks 17-18 years old- due to slow aging)
Gender: Female
Ethical Origin: German- she was born in East Berlin
Place/Type of Residence: Black Woods Asylum, Germany
Species: Half-Human/ Half-Slenderbeing
Left/ Right handed
Languages Spoken: German (Native Language), English (Intermediate)
Personality:
She's sweet to the ones she knows well
Childish in mannerisms
Curious about her surroundings
Very dependent on others
Overprotective at times for her perceived "family"
Tends to be clingy to certain people
Sensitive to certain emotional stimuli (i.e anger, and fear )
Can be a little emotionally unstable if riled up.
She can act rather aloof at times, sometimes not paying any mind to what's happening around her due to her being mentally preoccupied due to the voices of her illness.
Quirks:
Tends to shy away from strangers that she detects as slightly dangerous or a threat.
Tends to cling onto the ones she gets emotionally attached too and will get jealous if another person comes in the life of the one she clings onto (like a girlfriend/boyfriend to the person that Ally's attached to)
She gets overwhelmed if there is too much emotional stimuli or high levels of stress and might go Nightmare without meaning to.
Tends to hide from things that cause her fear
Sexual Preference: Pansexual
Relationship: Taken by Weeping Forest by pnckes

Date Of "Birth": December 6th, 1895 (Date of resurrection)
Astrological Sign: Sagittarius (November 22 - December 21)
Weight: 120 Lbs (Normal)/ 170 Lbs (Nightmare)
Height: 5' 4' (Normal)/ 6' 1' (Nightmare)
Eye Color: Blue
Skin Color: Light grey
Hair Color: White
Distinguishing Features:
Has a large brass clockwork wind-up key in her lower back. This is how her vitals are still working.
Large torn and jagged mouth in her Nightmare form. Also bleeds an inky black substance that has the consistency of blood from her torn flesh and tear ducts.
Interests: Doll Making, Sewing, Drawing, Playing Hide and Seek, Cooking, and Exploration
Favorite color: Blue!
Theme Songs:
Normal Form:"My Child" by Disturbed
Nightmare Form: "Indestructible" by Disturbed
Stats:

Normal:
Intelligence: 5 out of 10.
Physical Strength: 6 out of 10: Most of her strength is in her tendrils
Social Skills: 4 out of 10: Has a mentality of a child and tends to interact as such.
Stamina: 4 out of 10: She is known to get easily tired if worked up for too long
Perception: 8 out of 10.: Has heightened awareness thanks to her half blood nature. This includes thoughts and feelings through a telepathic link she can engage with others.
*Weapon Prowess: 5 out of 10: Knows enough to use bladed weapons defensively
Nightmare:

Intelligence: 8 out of 10: Has a mentality of a rather psychotic teenager; acts her perceived age
Physical Strength: 8 out of 10: Most of her strength is in her tendrils and is stronger due to adrenaline and rage
Social Skills: 6 out of 10: Can be quite sociable if not enraged. If enraged, her social skills are a 3
Stamina: 7 out of 10: Higher stamina due to rage and adrenaline.
Perception: 9 out of 10: Has heightened awareness thanks to her half blood nature. Awareness is heightened by one due to adrenaline.
*Weapon Prowess: 7 out of 10: Knows how to use bladed weapons defensively, lethally and effectively
Fears:
Electricity
Fire
Scientists and Doctors (due to being captured a few times and experimented/dissected alive)
Nightmares
The Dark
Special items:
Her signature black voodoo doll
Carries needle and threads to stitch anything up back together.
Her key is always in her back but there is a spare if its destroyed or torn out.
Powers/Abilities:
Telepathy
Teleportation over short distances
Black Tendrils from Back
Nightmare Form (triggered when she is highly distressed or when she's in bodily danger.)
Weapons:
Surgical Knives (Main weapon/Normal)
Chef/Butcher Knives (Nightmare)
Claws and Teeth (Nightmare)
Her tendrils (Both)
Weaknesses:
Electricity (Temporarily paralyzes her from the key stopping and can't move)
Sharp Objects (such as knives, glass, blades etc.) (She has human organs and can be stabbed and slashed)
Fire (Skin can't heal itself)
Emotional Stress (Causes her Nightmare Form)
Her Key (Weakest spot in combat and most vital part!)
Tendrils (Can be ripped out or cut off- causes blood-lost in long periods of time)
Exorcism (She's undead)
Necromancy (She's Undead)
Her Turquoise Soul Gem- (Anchors her soul to her body and is a main source of her powers due to the Slender blood being trapped in the crystals)
During the winter months, she sleeps heavily in a hibernation phase for several weeks on end so, she is vulnerable and unable to fight back due to being in deep sleep.
Strengths:
She is very agile for her state, and can contort her body when in Nightmare form due to her flexible spine. Though, if she stretches too far, her wires connecting her gears might come taunt, halting her movements and causing her great pain.
Inhuman strength in her tendrils and her body- shows most when she is pissed and also in her "Nightmare" form
Immune to poison due to being undead and immune to most psychic attacks given her halfblood nature.
Psychically attuned to surroundings
Resourceful when under pressure
Cause of Death (Before Resurrection) : Murder by mutilation from a hatchet by the head matron of the asylum- being struck so many times that she was pretty much cut into pieces.

Backstory:
Childhood: Born on November 8th, 1885 in East Berlin, and raised by the youngest of the older brothers Johnathan. She was born with Undifferentiated Schizophrenia, and was shunned by her mother, two eldest brothers and abused by her father.
Adolescence: At age five, she was sent to the Black Wood Asylum outside of Berlin and kept there for the remaining five years of her life and leading up to her death, she was hunted down as she was fleeing the asylum (which she had help from Nurse Ann) through the woods. This resulted in her being murder by mutilation from a hatchet- being struck so many times that she was pretty much cut into pieces with her limbs cut off and her chest cavity being cut open by the blows as well as some damage to her head and neck. Resurrection soon followed several months after the incident.
Adulthood: N/A
Origin Creepypasta: ORIGIN CREEPYPASTA: Rebirth

Relationships:
Parents: Annelie Grünewald (Foster Mother- Deceased), Slenderman (Father Figure/ Foster Father)
Siblings: None
Children: None
Relatives: None as far as she knows
Partner: Taken by No Eyes (by CrossDressingPanda )
Familiar: None
Mentors: Slenderman; Various Proxies
Friends:

Ravon
No Eyes
High Voltage
Stitches
Dream
Elmer
Psyche
Lolly Dolly
Amnesia
The Cat Hunter
Grace
Amnesia.EXE
Suicide Sadie
Lazari
Gentlemen
Victoria The Wooden Doll
Allies:

MOD
Mary Annette
Insomnia
She-Demon
GeekSheek
Rouge
Xena
Tears
Graveyard
Harley the Plague Proxy
The Hangman
The Broken Hearted Doll
Lulu
Rivals:

Grinner
Fidget Bridget
Voodoo Doll
Scarecrow
Crossroads
Mother Russia
Massacre Queen
Pestilence
Jeff the Killer
Nemesis
Enemies:

Zalgo
Katazumi
Eclipse
Mr. Stripes
Soothsayer
Plurality #2287
The General
Bella Luna
Bloody Mary
The Gambler
Toy Maker
The Hive
Elena
Elinor
Justice

Notes:

Her real name is Adeline Abendroth. However she doesn't recognize this name as it's from her past life.
Schizophrenic (Undifferentiated category) - Due to her mental illness, she claims to hear voices, can act with violence, argumentativeness and see things that aren't there (Hallucinations). It also causes her to have a childish mentality despite her age.
Due to dying at the age of 10, she is stuck with the mentality of a ten year old despite her appearance.
She has no pigment in her hair so it's white and has little to no pigment left in her skin so it has a grey tint to it. (Similar to a corpse)
Very emotionally unstable.
She "ages" very slowly due to the Slenderblood within her.
Her brass key is the only way she moves around and survives. Its connected to gears within her spinal cord that are connected to blood veins, nerves and other connections to keep her organs and other body functions working
She only has weak copies of some of Slenderman's powers. It was granted due to a complication during her resurrection after being sewn up. These powers though are too much for a human soul so it has caused two sides of her mind due to aggravation of her schizophrenia - Normal Form (which is her human side) and Nightmare Form (Her monster/Slender being side)
She was first stitched together in preparation for resurrection, creating the haphazard stitching all across her body, then Slenderman created a soul gem for her to be bound to her body. In the creation of the gem, some of his blood got mixed into the formation of the crystals, which caused the transferring of some of his abilities onto her; though these are weak copies of these abilities. Due to this, as mentioned above, it aggravated her mental state of mind and her already unstable soul so it created two sides to balance out the power given to her to her human side.
She's not technically considered a proxy, as the proxies protect her when they are idle, but still follows the rules and takes orders from Slender.
Carries a comfort toy of a black voodoo doll that she hates to part with- take it away and she will throw a fit!
Keeps her surgical knives hidden in her boots and her pins and needles inside hidden pockets in her over skirt of her dress.
Carries around black thread and a sewing needle just in case her seams in her skin come loose from age or damage.
During winter months, Ally, due her slenderbeing side, tended to hibernate with long bouts of slumber for a week or so and awaken for a few days of alertness before going back to sleep. It's odd but it also makes the job for protecting her much easier for the idle proxies
If in front of a mirror, Ally herself will see her normal reflection. However, bystanders might actually see a glimpse of Nightmare Ally instead in place of the doll's reflection.
She has memory "blanks" every time she recovers from her Nightmare form. She will not remember anything that has happen during that time. She call these blanks "Black outs"
Her Nightmare Mode is a last resort attack- if Ally gets too worked up in anger or sadness (or any other strong negative emotion), gets extremely afraid or is wounded enough that she can't fight back, it trigger's her Nightmare Form transformation
Can get very attached to one or more people and might react to them being harmed or injured
Nightmare Form Notes:

Her behavior can break down into two main traits-

Childish but in a more twisted sense- this is the personality trait that shows when Ally normally goes Nightmare. It resembles an psychotic adolescent. It involves her glee and pleasure to harm and kill everything that she could get her hands on- including the one who pissed her off.
Mature but very sarcastic and sharped tongue- This is a rare one, sometimes portrayed as her version of Slender's "inherited" intelligence- spits insults and can actually function like a normal 18 year old girl unlike her Normal counterpart. Although most times she only uses this trait if she wants to lure victims to follow or play mind games with them or is speaking through her "human" side with a temporary hold onto the body. Oddly protective of her other side since after all they share the same mind and body. Also tends to be very jealous of her other half given she's always "put to sleep" so her normal half can return to "normal"
Nightmare Form Combat Tip(s):
When Ally's key is pulled out, it causes the gears embedded on her spine to stop turning, making her fully paralyzed and unable to move. Also can cause slow death by simply lack of oxygen circulation from the blood through the heart. A side effect of this method is each time you pull it out in her Nightmare Form, it gets harder and harder to pull out each time afterwards.
Be persistent in combat- wearing her down into exhaustion or simply taking her down so she can't fight back is a good way to revert her to her Normal Form.
Her Nightmare side can take more damage/pain than her normal self, making the illusion of being indestructible. If she gets too overwhelmed though, she will collapse due to either blood loss or just an overload of pain reception. Another thing that will revert Ally back to normal is the removal of her key. This causes mass paralysis and makes NM Ally immobile, forcing her to return to normal. A side effect is that it gets harder and harder to pull the key after the first time doing it.

Misc. Notes:
The only reason Annelie Grünewald stayed with Ally and Slender is because she was in a way forced to. It was either keep the slaughter of the asylum a secret by remaining there or be killed by Slender. As well as that she was the reason Slender resurrected Ally in the first place as she was the one who let the girl escape. She only went to war later on to avoid suspicion and the discovery of Slender and Ally.
Annelie Grünewald dies in service as a nurse during WW1 saving Johnathan (who was Adeline’s older brother who tried to protect Adeline in their time together) Johnathan dies several years later in action.
Ann also was the one who made Ally her prized black and red voodoo doll that the living doll carries around. It was a gift on Ally’s “birthday” before Ann left for war.
Ally regards Annelie Grünewald as Mommy because of waking up to her and Slenderman after her resurrection. The same reason applies to Slenderman plus this was solidified by the realization of the “similar” powers between the myth and the doll. (Its like a baby duck sees you and think you're Mommy)
Ally’s extremely sensitive to the topic of “Mommy”; she still believes her "mom" will come back home.

Quotes

"I go by what Daddy asks of me."
"Beware..the shadows will consume you."
"Wanna play a game?"
"Am I a real person or an abomination?"
"Tick tock goes the clock..."
"I'm human...Well..sort of human..."

Further References (Please click!)
TRADITIONAL REF: Ally Anatomy Doodle + Misc. Notes
COLOR TRADITIONAL DOODLE: Hatchet Wounds
Nightmare Ally's Anatomy
Ally's Dress Design
Portrait of a Doll (Digital)
Ally's Color Palette
Ally's form height comparisions
Ally's Outfit and Character Notes
Ally's Transformation to Nightmare Notes
Doll's Madness

Further Insight/Information on Ally:
Ally's Complete Bio (OUTDATED)
Ally's Character Summary (SOMEWHAT OUTDATED)
Ally's Powers Essay (OUTDATED)

And there we go!

Slender Doll Ally and artwork (c) me!
Coloring/Redesign of Ref (c) The-Royal-Ink

Description
EDIT// Thank you The-Royal-Ink for offering to color, line and everything else on the reference for me! It looks amazing! ;v; So it's what I'm using from now on.

EDIT #3// Added and updated her information.

There! Finally got around to update Ally's reference sheet from the digital 2014 one. So, I hope this helps a lot!

Plus, that old reference sheet was making me cringe a little due to my lack of proper anatomy.

Also please read the backstory/history link below. It explains most of the things involving her powers, her death and her overall relationships with characters. This is only a summary/reference!

Though thank you all who supported me and her ;w; It's honestly very surprising!

~Ika

So here is a revamp of an old deviant of mine of Ally's reference. xD
Along with information:

Name: Ally
Real Name: Adeline Abendroth (from past life)
Nicknames:
Slender Doll
Ally-Doll
Nightmare Puppet
Victorian Ghost Child
Nightmare Bringer
Wind-Up Child
Operator's Doll
Operator's Puppet
Age: 118 years of age (Looks 17-18 years old- due to slow aging)
Gender: Female
Ethical Origin: German- she was born in East Berlin
Place/Type of Residence: Black Woods Asylum, Germany
Species: Half-Human/ Half-Slenderbeing
Left/ Right handed
Languages Spoken: German (Native Language), English (Intermediate)
Personality:
She's sweet to the ones she knows well
Childish in mannerisms
Curious about her surroundings
Very dependent on others
Overprotective at times for her perceived "family"
Tends to be clingy to certain people
Sensitive to certain emotional stimuli (i.e anger, and fear )
Can be a little emotionally unstable if riled up.
She can act rather aloof at times, sometimes not paying any mind to what's happening around her due to her being mentally preoccupied due to the voices of her illness.
Quirks:
Tends to shy away from strangers that she detects as slightly dangerous or a threat.
Tends to cling onto the ones she gets emotionally attached too and will get jealous if another person comes in the life of the one she clings onto (like a girlfriend/boyfriend to the person that Ally's attached to)
She gets overwhelmed if there is too much emotional stimuli or high levels of stress and might go Nightmare without meaning to.
Tends to hide from things that cause her fear
Sexual Preference: Pansexual
Relationship: Taken by Weeping Forest by pnckes

Date Of "Birth": December 6th, 1895 (Date of resurrection)
Astrological Sign: Sagittarius (November 22 - December 21)
Weight: 120 Lbs (Normal)/ 170 Lbs (Nightmare)
Height: 5' 4' (Normal)/ 6' 1' (Nightmare)
Eye Color: Blue
Skin Color: Light grey
Hair Color: White
Distinguishing Features:
Has a large brass clockwork wind-up key in her lower back. This is how her vitals are still working.
Large torn and jagged mouth in her Nightmare form. Also bleeds an inky black substance that has the consistency of blood from her torn flesh and tear ducts.
Interests: Doll Making, Sewing, Drawing, Playing Hide and Seek, Cooking, and Exploration
Favorite color: Blue!
Theme Songs:
Normal Form:"My Child" by Disturbed
Nightmare Form: "Indestructible" by Disturbed
Stats:

Normal:
Intelligence: 5 out of 10.
Physical Strength: 6 out of 10: Most of her strength is in her tendrils
Social Skills: 4 out of 10: Has a mentality of a child and tends to interact as such.
Stamina: 4 out of 10: She is known to get easily tired if worked up for too long
Perception: 8 out of 10.: Has heightened awareness thanks to her half blood nature. This includes thoughts and feelings through a telepathic link she can engage with others.
*Weapon Prowess: 5 out of 10: Knows enough to use bladed weapons defensively
Nightmare:

Intelligence: 8 out of 10: Has a mentality of a rather psychotic teenager; acts her perceived age
Physical Strength: 8 out of 10: Most of her strength is in her tendrils and is stronger due to adrenaline and rage
Social Skills: 6 out of 10: Can be quite sociable if not enraged. If enraged, her social skills are a 3
Stamina: 7 out of 10: Higher stamina due to rage and adrenaline.
Perception: 9 out of 10: Has heightened awareness thanks to her half blood nature. Awareness is heightened by one due to adrenaline.
*Weapon Prowess: 7 out of 10: Knows how to use bladed weapons defensively, lethally and effectively
Fears:
Electricity
Fire
Scientists and Doctors (due to being captured a few times and experimented/dissected alive)
Nightmares
The Dark
Special items:
Her signature black voodoo doll
Carries needle and threads to stitch anything up back together.
Her key is always in her back but there is a spare if its destroyed or torn out.
Powers/Abilities:
Telepathy
Teleportation over short distances
Black Tendrils from Back
Nightmare Form (triggered when she is highly distressed or when she's in bodily danger.)
Weapons:
Surgical Knives (Main weapon/Normal)
Chef/Butcher Knives (Nightmare)
Claws and Teeth (Nightmare)
Her tendrils (Both)
Weaknesses:
Electricity (Temporarily paralyzes her from the key stopping and can't move)
Sharp Objects (such as knives, glass, blades etc.) (She has human organs and can be stabbed and slashed)
Fire (Skin can't heal itself)
Emotional Stress (Causes her Nightmare Form)
Her Key (Weakest spot in combat and most vital part!)
Tendrils (Can be ripped out or cut off- causes blood-lost in long periods of time)
Exorcism (She's undead)
Necromancy (She's Undead)
Her Turquoise Soul Gem- (Anchors her soul to her body and is a main source of her powers due to the Slender blood being trapped in the crystals)
During the winter months, she sleeps heavily in a hibernation phase for several weeks on end so, she is vulnerable and unable to fight back due to being in deep sleep.
Strengths:
She is very agile for her state, and can contort her body when in Nightmare form due to her flexible spine. Though, if she stretches too far, her wires connecting her gears might come taunt, halting her movements and causing her great pain.
Inhuman strength in her tendrils and her body- shows most when she is pissed and also in her "Nightmare" form
Immune to poison due to being undead and immune to most psychic attacks given her halfblood nature.
Psychically attuned to surroundings
Resourceful when under pressure
Cause of Death (Before Resurrection) : Murder by mutilation from a hatchet by the head matron of the asylum- being struck so many times that she was pretty much cut into pieces.

Backstory:
Childhood: Born on November 8th, 1885 in East Berlin, and raised by the youngest of the older brothers Johnathan. She was born with Undifferentiated Schizophrenia, and was shunned by her mother, two eldest brothers and abused by her father.
Adolescence: At age five, she was sent to the Black Wood Asylum outside of Berlin and kept there for the remaining five years of her life and leading up to her death, she was hunted down as she was fleeing the asylum (which she had help from Nurse Ann) through the woods. This resulted in her being murder by mutilation from a hatchet- being struck so many times that she was pretty much cut into pieces with her limbs cut off and her chest cavity being cut open by the blows as well as some damage to her head and neck. Resurrection soon followed several months after the incident.
Adulthood: N/A
Origin Creepypasta: ORIGIN CREEPYPASTA: Rebirth

Relationships:
Parents: Annelie Grünewald (Foster Mother- Deceased), Slenderman (Father Figure/ Foster Father)
Siblings: None
Children: None
Relatives: None as far as she knows
Partner: Taken by No Eyes (by CrossDressingPanda )
Familiar: None
Mentors: Slenderman; Various Proxies
Friends:

Ravon
No Eyes
High Voltage
Stitches
Dream
Elmer
Psyche
Lolly Dolly
Amnesia
The Cat Hunter
Grace
Amnesia.EXE
Suicide Sadie
Lazari
Gentlemen
Victoria The Wooden Doll
Allies:

MOD
Mary Annette
Insomnia
She-Demon
GeekSheek
Rouge
Xena
Tears
Graveyard
Harley the Plague Proxy
The Hangman
The Broken Hearted Doll
Lulu
Rivals:

Grinner
Fidget Bridget
Voodoo Doll
Scarecrow
Crossroads
Mother Russia
Massacre Queen
Pestilence
Jeff the Killer
Nemesis
Enemies:

Zalgo
Katazumi
Eclipse
Mr. Stripes
Soothsayer
Plurality #2287
The General
Bella Luna
Bloody Mary
The Gambler
Toy Maker
The Hive
Elena
Elinor
Justice

Notes:

Her real name is Adeline Abendroth. However she doesn't recognize this name as it's from her past life.
Schizophrenic (Undifferentiated category) - Due to her mental illness, she claims to hear voices, can act with violence, argumentativeness and see things that aren't there (Hallucinations). It also causes her to have a childish mentality despite her age.
Due to dying at the age of 10, she is stuck with the mentality of a ten year old despite her appearance.
She has no pigment in her hair so it's white and has little to no pigment left in her skin so it has a grey tint to it. (Similar to a corpse)
Very emotionally unstable.
She "ages" very slowly due to the Slenderblood within her.
Her brass key is the only way she moves around and survives. Its connected to gears within her spinal cord that are connected to blood veins, nerves and other connections to keep her organs and other body functions working
She only has weak copies of some of Slenderman's powers. It was granted due to a complication during her resurrection after being sewn up. These powers though are too much for a human soul so it has caused two sides of her mind due to aggravation of her schizophrenia - Normal Form (which is her human side) and Nightmare Form (Her monster/Slender being side)
She was first stitched together in preparation for resurrection, creating the haphazard stitching all across her body, then Slenderman created a soul gem for her to be bound to her body. In the creation of the gem, some of his blood got mixed into the formation of the crystals, which caused the transferring of some of his abilities onto her; though these are weak copies of these abilities. Due to this, as mentioned above, it aggravated her mental state of mind and her already unstable soul so it created two sides to balance out the power given to her to her human side.
She's not technically considered a proxy, as the proxies protect her when they are idle, but still follows the rules and takes orders from Slender.
Carries a comfort toy of a black voodoo doll that she hates to part with- take it away and she will throw a fit!
Keeps her surgical knives hidden in her boots and her pins and needles inside hidden pockets in her over skirt of her dress.
Carries around black thread and a sewing needle just in case her seams in her skin come loose from age or damage.
During winter months, Ally, due her slenderbeing side, tended to hibernate with long bouts of slumber for a week or so and awaken for a few days of alertness before going back to sleep. It's odd but it also makes the job for protecting her much easier for the idle proxies
If in front of a mirror, Ally herself will see her normal reflection. However, bystanders might actually see a glimpse of Nightmare Ally instead in place of the doll's reflection.
She has memory "blanks" every time she recovers from her Nightmare form. She will not remember anything that has happen during that time. She call these blanks "Black outs"
Her Nightmare Mode is a last resort attack- if Ally gets too worked up in anger or sadness (or any other strong negative emotion), gets extremely afraid or is wounded enough that she can't fight back, it trigger's her Nightmare Form transformation
Can get very attached to one or more people and might react to them being harmed or injured
Nightmare Form Notes:

Her behavior can break down into two main traits-

Childish but in a more twisted sense- this is the personality trait that shows when Ally normally goes Nightmare. It resembles an psychotic adolescent. It involves her glee and pleasure to harm and kill everything that she could get her hands on- including the one who pissed her off.
Mature but very sarcastic and sharped tongue- This is a rare one, sometimes portrayed as her version of Slender's "inherited" intelligence- spits insults and can actually function like a normal 18 year old girl unlike her Normal counterpart. Although most times she only uses this trait if she wants to lure victims to follow or play mind games with them or is speaking through her "human" side with a temporary hold onto the body. Oddly protective of her other side since after all they share the same mind and body. Also tends to be very jealous of her other half given she's always "put to sleep" so her normal half can return to "normal"
Nightmare Form Combat Tip(s):
When Ally's key is pulled out, it causes the gears embedded on her spine to stop turning, making her fully paralyzed and unable to move. Also can cause slow death by simply lack of oxygen circulation from the blood through the heart. A side effect of this method is each time you pull it out in her Nightmare Form, it gets harder and harder to pull out each time afterwards.
Be persistent in combat- wearing her down into exhaustion or simply taking her down so she can't fight back is a good way to revert her to her Normal Form.
Her Nightmare side can take more damage/pain than her normal self, making the illusion of being indestructible. If she gets too overwhelmed though, she will collapse due to either blood loss or just an overload of pain reception. Another thing that will revert Ally back to normal is the removal of her key. This causes mass paralysis and makes NM Ally immobile, forcing her to return to normal. A side effect is that it gets harder and harder to pull the key after the first time doing it.

Misc. Notes:
The only reason Annelie Grünewald stayed with Ally and Slender is because she was in a way forced to. It was either keep the slaughter of the asylum a secret by remaining there or be killed by Slender. As well as that she was the reason Slender resurrected Ally in the first place as she was the one who let the girl escape. She only went to war later on to avoid suspicion and the discovery of Slender and Ally.
Annelie Grünewald dies in service as a nurse during WW1 saving Johnathan (who was Adeline’s older brother who tried to protect Adeline in their time together) Johnathan dies several years later in action.
Ann also was the one who made Ally her prized black and red voodoo doll that the living doll carries around. It was a gift on Ally’s “birthday” before Ann left for war.
Ally regards Annelie Grünewald as Mommy because of waking up to her and Slenderman after her resurrection. The same reason applies to Slenderman plus this was solidified by the realization of the “similar” powers between the myth and the doll. (Its like a baby duck sees you and think you're Mommy)
Ally’s extremely sensitive to the topic of “Mommy”; she still believes her "mom" will come back home.

Quotes

"I go by what Daddy asks of me."
"Beware..the shadows will consume you."
"Wanna play a game?"
"Am I a real person or an abomination?"
"Tick tock goes the clock..."
"I'm human...Well..sort of human..."

Further References (Please click!)
TRADITIONAL REF: Ally Anatomy Doodle + Misc. Notes
COLOR TRADITIONAL DOODLE: Hatchet Wounds
Nightmare Ally's Anatomy
Ally's Dress Design
Portrait of a Doll (Digital)
Ally's Color Palette
Ally's form height comparisions
Ally's Outfit and Character Notes
Ally's Transformation to Nightmare Notes
Doll's Madness

Further Insight/Information on Ally:
Ally's Complete Bio (OUTDATED)
Ally's Character Summary (SOMEWHAT OUTDATED)
Ally's Powers Essay (OUTDATED)

And there we go!

Slender Doll Ally and artwork (c) me!
Coloring/Redesign of Ref (c) The-Royal-Ink