Clutcher

light blue skin , dark blue hair, black eyes, color blindness , or bite innocent people , gay

When he was young, he still had a bth family, the context was that the government rounded up some children in the development stage to use as experimental subjects for their own gain, he was arrested and returned to the camp with several other children. Then he was injected with all sorts of drugs. Other children died from drug overdose or turned into generally disgusting things, but he had his nerves and other senses affected so he didn't lose consciousness at that time. At that time, the experimental area decided to keep him and nurture him to see if he could be of any help (but they chained him up because he often bit people innocently).