Melvin is Pink's younger brother and ran away from home to get away from their abusive father (after Pink did) he wound up staying where his brother was (with Autumn and her crew) for the time being.
>.> He lost his arm in a car crash or something and has a rather serious personality. He doesn't like being touched unless he has no choice. Melvin possesses no real aspirations for the future. He has odd views on life and doesn't really like anybody much.