Hey hey *points at Michael*
Warning, text wall, I got a little carried away lmao
Micheal Afton(14-29)/Mike Schmidt(30-death) is a bisexual trans man.
When he was 14 he would often bully his younger brother Oliver, including hiding in places around the house and scaring him, locking him in the Parts and Service room at Fredbears, and pulling the "prank" that lead to his brothers death.
Like his siblings, he was ab*sed by William, however his was more physical than the others. The ab*se wasn't because he was trans or bi, it was simply because William is a dick and hates his children. His bullying was often encouraged by his dad, giving him different ideas for scaring Oliver. He never bullied Elizabeth, he favored her more than he did Oliver, besides, scaring her wouldn't be as fun.
After the bite of 83, he was full of guilt and regret, he didn't mean to hurt him that badly, it was supposed to be a joke. It got even worse after he found out that Oliver was dead. He knew he would get in trouble with his dad for it, after all, William hated having to spend money on things he deemed unimportant, including hospital bills.
He later ended up taking a job as a technician at CBEAR, suggested by his dad. He knew Elizabeth was still there, William told him, he also told him he had to "free her". He made the mistake of trusting Carmen throughout his shifts, leading to his first death at the hands of Lukas(Ennard). He eventually came back after Lukas left his body due to decomposition. He only came back due to the remnant left in his body.
Later he took the night shift at Freddy Fazbear's pizza, going by Mike Schmidt, knowing about his dad's murders, and wanting to help. He was in the building during the events of the FNAF 3 minigames, he's the one who sealed the saferoom in hopes of keeping his dad there forever. He is also the one that set Fazbear's fright on fire.
About 3 or 4 years after fnaf 3, he because the owner of Freddy's Rockin' Pizzaria(FNAF 6), after being contacted by Henry for the job opportunity. He recognized almost all of the animatronics form the alley, the robots from CBEAR, his dad, his sister, and another he didn't recognize, but felt familiar. He knew they were tryubg to kill them, they had before, they would do it again. When everything caught on fire, he was unnaturally calm, he knew everything would be over after this, and everyone could be free, but he didn't know just how wrong he was.
He will return, but I don't have all that planned out yet.