Subject 4 (Jackson)

Jackson is Subject 4 of Family 00437. THHPII takes place on his birthday. He seems to be very social, as he invited many friends over for the party. Jackson also is a fan of Boomy the Cat.

Speculation
Jackson may have depression, as he is constantly shown dejected and unhappy with his family. His bedsheets were stolen by the Creature, and he does not bother to put new ones on. This lack of hygiene and taking care of oneself can be viewed a symptom of depression. Jackson is also seen moping around the house, hiding the party favours after his birthday party is canceled, and lying on the couch playing on Anne's iPad. The depression could've been caused by his dad remarrying, and he has not gotten used to it yet. Watching and drawing Boomy the Cat seems to be one of, if not the only, coping method he has.