RED:
Okay, so red is probably the most simple character, but also the hardest to actually get close to (barring mi). 
He was raised in an extremely abusive household. His father was extremely cruel to red and his mother, denying food, screaming, beating, tying up, locking up, shooting, and the final straw, when his father tried to kill him with a knife. That’s where the abdomen scar came from. He would’ve gone further, but red’s mother intervened, and pushed him away. Red’s father brutally beats