The Baby (Ava Greywhinder)

Ava Greywhinder - known also as The Baby and The Doll - is the youngest child of Martin and Gloria Greywhinder. She was killed by the Stitchbuddy on Martin's command and was transformed into a stop-motion puppet.

Don't Cry.mp4
This is first appearance of The Doll. It reveals the identity of The Doll to be Ava Greywhinder, or The Baby. Within the video, directly after the Ice Cream Man smashes his face against a wall, there is a zoomed in shot of The Doll's mask with a large crack/bite-mark on the top of it. Small streaks of blood have flown from this spot. A few seconds later The Doll removes its mask to reveal a crying baby's face (Ava) as a spine-tingling baby shriek begins to play.

_Rebirth_
The second appearance of Ava Greywhinder. Though the tape is not only about her, but it explains how she dies. We view the room through a baby monitor as little Ava is sleeping in her crib at night. The Stitchbuddy (Banzo) is ordered by Martin to kill her, so later on in the night Banzo sneaks into Ava's room and watches her from above, taking some time to debate if he should kill her or not.

Kill / Don't Kill
Kill - Banzo kills Ava (supposedly by biting her head). Martin congratulates him on doing as he asked and proving his obedience. He then calls Banzo a "monster" because Martin did not physically kill her, even though he commanded Banzo to do so.

Don't Kill - Banzo disobeys Martin, deciding not to kill Ava. Martin comes up behind Banzo as he is still staring at Ava, yelling angrily. He scolds Banzo for his actions, calling him "broken" and stating that "He was so close" and "It's not his fault".

My Two Front Teeth - [Harmony & Horror Christmas Special]
Ava appears in the beginning when her sister, Sophia, holds her up and says to Henry, "Well, maybe you should get bundled up like this cute, little Christmas present" as a joke for him being so cold.

Two days later, Sophia wakes up and goes into the living room to meet Uncle Arthur and Henry. Arthur gives her a wrapped present and tells her, "Oh, before I forget, Sophia. Your father wanted me to give you this gift. It's rather heavy, but he said not to open it till' Christmas Morning".

A little bit before the end, when Sophia is the only living one left in the family, she hears Ava crying and goes to search for her, however she does not find her and winds up getting killed. And after everything is over, it is sadly revealed that the contents of the gift were the murdered remains of Ava Greywhinder and the credits roll with the picture of her lifeless body in the background.

THE_PERFECT_PET
Both Ava and Banzo seem to make a return for the revamped version of Harmony & Horror in this tape. At 10:20, the video cuts to an empty scene where The Baby Doll is lying down on a checkered floor underneath a spotlight. As it rises up, something else can be seen from the distance which is revealed to be a badly damaged Banzo.

The Baby Doll tries to crawl to him as a path begins to light it's way. Banzo calls out via a bark to the doll that eventually tries to stand and walk over to him from afar. Unfortunately, it stumbles over itself, cracking the center of it's head as the expression changes to a frown. It proceeds to sit back down as it cries out in pain, extending it's arms out to Banzo in hopes of reaching him.

As a response, Banzo works up enough strength to crawl along the floor to the doll. However, Banzo quickly faints as The Baby Doll tries to continue on crawling towards him. A disembodied voice is heard saying the following during this scene (presumed to be Banzo):"'I don't know you that well. But I know you feed me treats, you pet me, you loved me Ava. I'm so sorry little one.'"The scene fades to white as two options are presented to the viewer: free or rebirth.

Free/Rebirth
Free - This option seems to reveal the good ending to the previous tape where both The Baby Doll and Banzo are seen laying down together. A soft lullaby plays gently in the background (Rock A Bye Baby to be exact) as the following text appears (revealing dialogue between Ava and Banzo):"B: 'Ava...?'""A: 'Puppy.'""B: 'I'm so sorry...'""A: '...'""B: 'Don't cry. I know it hurts.'""A: 'Mama.'""B: 'Let go Ava. It's okay. I'll take you to your Mama.'"As the dialogue ends, two spherical shapes can be seen exiting the bodies of The Baby Doll and Banzo which float upwards (presumably to Heaven) before the scene fades out. Rebirth - This option seems to reveal the bad ending to the previous tape as two officers are heard exploring the Greywhinder residence to arrest Martin for his crimes. Unfortunately - instead of being free from their torment - The Baby Doll and Banzo have merged together to become another one of Martin's monstrosity hellbent on finding and attacking the officers.

It could be assumed after these events within the tape led to the creature's escape or retreat further within the Greywhinder residence. For now, it's not known what became of both the merged monstrosity or the officers investigating the building.

Trivia

 * Banzo seems aware of his relationship with Ava as "THE_PERFECT_PET" tape confirms he was against killing Ava by Martin's command.
 * He's also quite protective of Ava considering she was the youngest out of her two other siblings, making her a larger priority and source of guilt when he wasn't able to protect her from him.
 * Ava doesn't seem to understand that she is dead unlike her older siblings, instead calling out to Banzo and her mother Gloria for help.
 * She's not entirely hellbent on receiving justice for what Martin has done to her considering her young age.
 * Some people have been debating on how exactly Ava did die in the series considering some are convinced Martin is to blame (when Banzo failed to do so for him) whereas some speculate Banzo was responsible. But, one crucial feature emphasized in the series seems to indicate possible brain damage and/or internal bleeding via her skull being heavily wounded.
 * Ava might have possessed a stop-motion doll instead of becoming it given there's no flesh/bone interior to indicate her body being linked to the doll besides from the wound on its head and scar against its chest. This and there being little indication that Martin made Ava into the stop-motion doll like her other siblings.
 * Besides from Gloria and Amy, she is one of Martin's victims to not be made into a purchasable toy or mascot for his production line.