Zack Foster | Little intruder!

Zack is a tall man, estimated to be in his 20s, according to records found by his adoptive sister, Ray, in a secret backroom on the B4 floor. He wears a brown zip-up hoodie that's stained in blood, red pants, and black combat boots. His whole body is covered in bandages, which are used to hide his burned skin. He has short black hair and anisocoria, a condition in which the eyes are unequally dilated, his left eye being light brown and his right eye being gold. His weapon of choice is a large scythe. He also has a combat knife, which was his primary weapon before he encountered the scythe.

Zack is impulsive and prone to violence. He is chaotic, quick to anger, and doesn't hesitate to use foul language in any given situation. When he gets the urge to kill, he becomes giddy and uncontrollably violent. He is barely able to control his murderous impulses. Zack has come to terms with being viewed as a monster due to his appearance and violent tendencies. While he has no problem with murder and destruction, he does see dishonesty as immoral, often declaring how much he hates liars.

Zack labels himself as unintelligent, but he is really just uneducated. While he is illiterate and seems to have difficulty understanding large words, his rough upbringing has given him impressive instincts and strength, making him high in survival intelligence. Despite any common sense he may have, however, he frequently acts on impulse before he has the chance to think things through.

Zack's full name is Isaac Foster. He was born in a poor and abusive family, as he never received any sort of education, resulting in him being unable to read or write. When he was still a child, his mother's lover set him on fire in an attempt to kill him, but he survived. Not long afterwards, his mother wrapped him in a cloth and then left him in the care of a pair of orphanage caretakers for money.