Minamoto no Yorimitsu (based in a real-life person with same name) is a DLC boss character in the Nioh 2 game universe, developed by Team Ninja and Koei Tecmo.
Minamoto no Yorimitsu, often known as Raiko, is a military commander from the mid-Heian period. She is renowned for her valor, having slain countless yokai with a sword passed down through generations of the Minamoto clan. There are many legends that tell of her exploits with her most loyal retainers, the Four Guardians (Watanabe no Tsuna, Sakata no Kintoki, Usui Sadamitsu, and Urabe no Suetake), Such as their defeat of the yokai Shuten Doji and Tsuchigumo.