I have a good few ideas for this. Let me know what you think would work best.

-Shapeshifting genetic abomination set loose, but has a friendly and childlike demeanor

-Exiled True Kin physician, whose unethical experiments have infected him with a mutagenic nano-virus.

-Scummy Carcogen bounty hunter, on the run from his former tribe. Think Frank Frazetta meets GWAR.