Suzuna

Serina is the older sister of Suzuna also ninja who apprened episode 59 The Beautiful Sisters Apprentices (along with Suzuna), posing as villagers to Sango in the demon slayer village. That night, the sisters attempt to steal Sango's weapons in order to fight demons to avenge their father's death. Both sisters come from the Ninja clan after their father was killed by demons. But Sango warned them the weapons are actually made by demons. Later, The Sisters are saved by Inuyasha and gang. Both go on their own journey in the end.