Sumi's classmate and fellow hero. She uses a large trident in her hero form. As a result of using Mankai too many times, she lost the use of most of her limbs and became unable to move, and afterwards was put in direct supervision of Taisha as a trump card. She later appears in the anime series, where she informs Yuuna Yuuki and Mimori Tougou about the truth behind the Hero System.