Zanpakutou: Mirokumaru

Senna is a mysterious young shinigami who Ichigo Kurosaki and Rukia Kuchiki end up encountering in the world of the living claiming to be a soul reaper. However, she seems to not know what squad she is from, and her credibility is questionable at best.

Although she is haunted by brief, randomly appearing memories of "her" past, Senna generally exibits a spunky, upbeat, and carefree personality. She's also very curious, constantly darting from place to place. Senna also likes the color red and high places, claiming that being up high helps her forget about the world around her. She is believed to have some sort of relation to a string of events relating to the Valley of Screams and the "Dark Ones."