Fuyumine (直刀, Fuyumine)
Fuymine appears as a man in his 30s - 50s.
Gave Naoto her present name and took her in.
Fuyumine's student. Magato "killed" him.
Fuyumine's former student. Taught her how to fight when she was still "Naoto".
Dogs: Stray Dogs Howling In The DarkEdit
Raised Naoto after finding her in a near death state. He t her how to fight and how to survive. Despite living together, they didn't have a good relationship. After Naoto found Fuyumine "killed" by Magato, she sought revenge by defeating Magato in a fight and took Fuyumine's name and sword.
Dogs: Bullets & CarnageEdit
Fruhling encounters a shadowy man in the manga who reveals to be a alive Fuyumine, but it's unlikely that Naoto knows this. It's later reveal that he used to work for Heine's "mother" and taught Magato and the original Naoto.