Rosanna is part of the Underworld Queens and the leader of Hedonia, a Mafia-esque crime syndicate. Rosanna is considered to be the Underworld Queen's thrill-seeker as she always use violence as a measure to solve all problems. She has no fears of meddling with death either. Compared to other members of the Underworld Queen, she is far more pugnacious and firmly believes that violence is the ultimate panacea. She does, however, take exceedingly good care of those who are part of her gang.