Matsunaga Sara

Sara is a second year student at Kyumeikan Girl's High School. Before graduating, Tanaka You was also a student there and Sara's senpai. She may not look it, but she is an experienced hacker, capable of breaking into nearly any computer system. Sara is also obsessed with ninja and ninjutsu.

Sara came to LeMU on a class field trip, but now she is stranded along with the other characters.

She is the daughter of Komachi Tsugumi and Kuranari Takeshi, from their relationship in 2017, and Hokuto's younger twin sister.