Shizuku Kurogane's close friend and roommate. He likes to give Ikki, Shizuku's brother, advice from time to time, and is very interested in how he is developing over the course of the series.

His Device is Darkness Hermit, and its Noble Art is Shadow Bind. This Device allows him to create shadow portals that enable travel from one place to another. This can also be used to immobilize opponents by pinning them down through their shadow.

Nagi states that he identifies as more of a woman in a man's body, and prefers the name Alice to Nagi, but he states that he doesn't truly care how he's referred in the end. Due to this, his friends tend to lean into referring to him by Alice.