I've made an NPC freak too. Tell me what you guys think.

[hider=Spiderhead]
Name: Leonard Birch (But nobody knows)

Freak Label: Spiderhead / Fate Spider

Age: 30

Faction: Freak

Ability: Spiderhead has two juices he can inject when biting: 1) superhealing juice, gives the bitten person the effect of wolverines almost instant healing ability for about ten minutes. Cures anything except for death.
2) supervenom, does the opposite of superhealing and kills you within ten minutes as you find that all harm that ever befell you and that already healed, comes back tenfold. (imagine that papercut you had on your finger a few days ago and that has already healed, coming back and growing until your finger falls off)
These blessing and curse are heavily intertwined as they affect his own health. When spiderhead kills somebody, he gains the superhealing ability himself. It's stored on himself until he decides to heal somebody. When he heals somebody without having the charge gained from killing anyone, he has to kill someone within 24 hours or die himself. 

Mutation: instead of a normal human head, Spiderhead has the giant head of a spider, about three times the size of a normal human head. This gives him Pincers which he can use to bite people and to break things. Spiderhead has normal human intelligence, but has trouble speaking normally, because he lacks a human mouth. He can talk, but it always sounds sort of raspy. 

Weakness: Armor, his pincers are strong but can't pierce through metal armor. Also, if you would somehow cut of his pincers, he would lose his power unless he has one healing charge stored, then they will regrow. 

Personality: Quiet, contemplative, accomodating. Initially mild natured, but hardened due to the nature of his ability and people who want to use him for their own gain. 

Appearance: Spiderhead wears a black blouse (as no shirt would fit over his head), black skinny jeans and Big brown boots that don't match the rest of his outfit. He wears a necklace with a yin-yang symbol. And ofcourse, he has a big spider head. 

Background: imaginably, spiderhead doesn't have an easy time socializing. He lives underground with the rest of the freaks. He claims to have met the high venom in person and feels highly related to her. People from both under and upperground seek out the help of spiderhead for his healing ability. He wants to help people, but every healing comes at the price of a death, so that has to be provided. Also spiderhead often finds himself caught up in the plans of freaks who are up to no good and cause mayhem upperground. He tries to be as good a person as his situation allows him to. But it's a very shadey area. He tells himself that for every life he takes, he can save someone. 
[/hider]