Raiden Mei is a Mafia faction underboss, the group is named Anti-Entropy. She is known to be cold-blooded, stoic, and for always putting her work in first place whatever it may be, she have a lot of respect from the other members and even some are afraid of her, because of her way to be and status.

Mei has been known to be very cruel and ruthless, even towards her own men. She often seen as a cold and calculating individual, who is not afraid to get her hands dirty when it comes to work.