InuYasha (2000)

S1E5 Aristocratic Assassin, Sesshomaru

Kagome discovers that Inuyasha is a half-demon, the offspring of a human mother and a dog demon. Soon after, Inuyasha's brother Sesshomaru arrives, on a quest to find their father's grave. To gain the upper hand over Inuyasha, he brings along the spirit of Inuyasha's deceased human mother. However, she is revealed to be a demon known as a muonna, complicating the situation further.