Ume is a beautiful young girl with a fine and soft line. She is Gyutaro's little sister, a thin and repulsive-looking young boy...working as a reimbursement agent. She may be clever...but knows how to use her feminine charms, although she is very young. She lives in poverty, but is always well-dressed and calm, acting like a girl of nobility, but hiding a cold, selfish, manipulative, and sociopathic demeanor.