 is the half-sister of Isshin Sumeragi who is driven to avenge her half-brother after learning that Renya was responsible for his death.While she is serious regarding matters involving the Sumeragi family and is an agile fighter in the ninjutsu arts, she often finds herself in unexpectedly comic situations.During her first encounter with Renya, she witnesses the power of his left arm when he uses it to kill the warthog pursuing her.