Chimère

Chimère is a human that was born, alongside her twin brother Monstre, horribly malformed. Despite their appearance, they were not abandoned by their mother, who tried to care of them as well as she could, on an island as inhospitable as Mercy Island.

While they were still young children, he mother was killed in a conflict between two rival villain groups. By surviving in the lawless streets of the island, they gained enough strength and guile to make a living, until they were noticed by Archlord Thunder, who recruited them as minions.

So long has both her brother and herself can live properly, Chimère has no issue obeying her master by stealing anything needed and assassinating anyone required.