Her real master disappeared, so her pactmaker asked the young master to take her in to give her a purpose. He was able to enlist her help by telling her they were comrades, rather than abandoning her former master.
A Child who refuses to share her name, claiming "a true ninja never reveals their identity!"
All that is known about her s that she is set on becoming the ultimate guardian of her master, Heroic Legend. So far, all attempts to convince her of the ridiculousness of such a title have fallen on deaf ears.
Her first master went missing in the aftermath of a climactic battle against Rufus.