Former Humans

Heroes who used to be humans but aren't anymore, either because they were killed and brought back as something else(as was the case with Ayumu Aikawa and Issei Hyoudou), became something else by accident(Tsukune Aono is a good example of this) or had their humanity simply taken out of them, either unwillingly or voluntarily.

IMPORTANT NOTE: Do NOT add heroes who were believed to be human at first but then turned out not to be, as was the case with Goku and Hyouka Kazakiri(among others). This is specifically for heroes who started off as humans but aren't anymore due to a certain circumstance.