Zack(Isaac Foster)

About Him
All of the these can possibly be a spoiler so yeah...

His a killer who kills a person when they are smiling. The possible reason of it being because of the way he recognize that the people whom are the reason why his life is hell, are all smiling and laughing when they neglect or abuse him etc...

Has bandages that cover up his scars, which is almost everywhere in his body.

A man who has anger issues, hates lies and Kills anyone if he is in the mood but he somehow hot af.

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Zack carries a scythe all the time and kills people with it (but not Rachel). He hates LIARS and hates when Rachel has that emotionless face. Zack often tells her to just smile and that he is the boss of her. He also dislikes when Rachel tries to control him or tells him what to do. He does love Rachel though because when the Priest asks why he has to get her back, Zack becomes upset. He also lives in floor B6

Skills/Weapons:
weapons:

scythe: He found that giant head cutter at his floor at B6. The time he became a head master in that particular floor. He uses it if him or Rachel are in trouble and need help. Unfortunately, his scythe broke at the last parts of the series but he got a new one in the end so yay!

Knife: When he was at the illegal orphanage he experience having to live with abusive owners whom neglect him and abuse him and even making him burry dead bodies of children who didn't survive there. After the time he buried another batch of death orphans, he notices that the tv is on and decides to watch. A horror movie was being played where a killer killed a couple I'm the middle of the night. Zack being infatuated by this now having an idea of what he should do to end his problems ones and for all. He grabbed the knife, killed the owners and left.

Combat Knife: This was when he was little. When a nice old man cared about him died. He found the knife in the old geezers house. Zack realizing that the old dude died and the killers are two young adults that has a plan to kill the old guy to get his money. Zack now then has two first victims to kill using that combat knife.

Skills:

Physical capabilities: After the incident... Zack has been living in the streets and as a run away from a long time the reason if him increasing his physical abilities to survive. This includes his high endurance where his victims and himself is indeed right about the fact that he can't die so easily. Also his speed which he uses to run at his running victims and also run away from the poh - poh

Personality
He is a psychopath who likes to murder (still is and still does) but when he is around Rachel he calms down a bit and Rachel would do anything to keep him alive as well.

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This also includes of him sometimes being childish and in English dub, crack some jokes form time to time. Whiney sometimes, and gets easily pissed of at something or someone he hates.

I personally believe that he is a sociopath. Reason of it being that he is originally a decent quite child who got f'd up by the people around him since sociopaths are made and not born but hey I'm neither so how the hell would I know? ┐(´ー｀)┌

Backstory:
contains spoilers of course ^ ^

"Home":

Zack's childhood wasn't the best really. It began where the boyfriend of the one who gave birth to Zack (which I'm not certain if that's his actual dad, that he just doesn't want to call them mom and dad since he don't see them as such or he doesn't know

the word 'mom' and 'dad'). In the end he died and Zack survived during that fire. I heard that Zack actually used his teeth to remove the boyfriend's flesh so he could easily die

Orphanage:

His mother wrap him in bandages since all of the parts of his skin got burned except the bottom part of him. After that make over, his mother sent him to and orphanage which the owners of that illegal place is abusive toward the orphans that would include Zack. The time where he was living there he felt extreme neglect having to eat scrap foods to survive and also using him for their benefit making him a tool. Back then he was quite obedient. Just blindly following orders. The time where Rachel instructs him what to do when they're on Cathy's floor made him recall especially the dollhouse part in the anime and the 'stepping stones' (I like to call them stepping stones :P) the time where he has been called a tool which really pissed him alot.

(JUST MY THOUGHTS)

Judging by his past, I wouldn't see Zack saying to Rachel that "I'm the boss" but rather "Leave me alone, don't tell me what to do, because I will be the one who tells my self that and you will be the one who tells your self that" kind of context.

Weakness
When Rachel asks him to do something he accept or denies it which can lead them in big trouble.

Protecting Rachel is a problem because he tells Rachel to worry about herself but he worries about her

Hot Head he gets mad very easily can get him and Rachel injured or killed

Childhood he hates everything about his childhood and doesn't want to remember it.

￼He is also scared of fire because of his past childhood with his father.