Izayoi

十六夜

Izayoi is Inuyasha's mother. In the manga, she remains unnamed.
Details about Izayoi are scarce, as she passed away before the series' events began and Inuyasha seldom discusses her, likely due to lingering grief over her death. She was the daughter of a feudal lord and eventually met and fell in love with Inu no Taishou, who reciprocated her feelings. While they formed a relationship, it is never explicitly stated whether they were married or officially mated. After Inu no Taishou's death, she was left to raise their son, Inuyasha, alone. She grieved the prospect of Inuyasha facing discrimination from both humans and demons because of his hanyou heritage. The timing and cause of her death remain unknown, though she died when Inuyasha was still quite young.
The manga never provides a name for Inuyasha's mother, but one is assigned to her in the series' third movie. Sesshomaru holds Izayoi responsible for his father's death, asserting that she weakened Inu no Taishou, which led to his demise.