A mathematical genius from Millennium Science School, she's is a troublemaker, a gremlin, member of the "Seminar" student council. She causes problems to the members of "Seminar", especially Yuuka and Noa.She normally uses internet slang.

She is a prodigy when it comes to analyzing probabilities, although she herself completely unaware of it. Likes games of chance, and constantly tries her luck in various ways. Even when she is in trouble, she never gives up.