Nosuri is the leader of the Nosuri bandits, a gang of righteous thieves. After an incident involving Anju, the crown princess of Yamato, she is forced to work with Haku's team. She is revealed to be the daughter of the deposed chieftain of Izuruha, leading her to become the next chieftain. While she might be knuckleheaded, she has a good heart and with this (plus the aforementioned mishap), she gained the implicit trust of Anju as her liege.
Nosuri is from an offshoot Evenkuruga clan in Yamato. Thus, she is of the same race as Touka and Genjimaru and has the same core values.