Nagisa is Kojou's younger sister and attends the same school as Yukina and Kanon, sharing class 3-C with them. She's close friends with Yuuma Tokoyogi and gets along well with both Yukina and Kanon. Her mother is Mimori Akatsuki. She's known for being talkative around people she likes and is genuinely talented in the kitchen.
The biggest thing about Nagisa is her trauma from a train accident four years back that demons caused—she still gets shaken up whenever she encounters one. Things got worse after she was possessed by "Root," which left lasting psychological marks.
She met Yuuma when both he and Kojou helped retrieve her hat from a branch hanging over a cliff. Once they were all safely back, the three introduced themselves properly.
Content compiled by AnimeList.moe from publicly available sources.
