Taimanin Yukikaze(2013)

Taimanin Yukikaze is an anime series following Mizuki Yukikaze, a student at a ninja training academy honing her demon-fighting skills. When Yukikaze and her friend Akiyama Rinko decide to infiltrate an evil organization to search for Yukikaze's missing mother, they discover the mission demands a devastating personal cost. As the two navigate dangerous undercover work, they must confront both external threats and the moral weight of their choices. The series blends action-driven ninja combat with darker themes of sacrifice and determination, exploring what lengths one will go to find family.