Nijiko
A specialist in earth science and medicine classes, Nijiko's defining trait is her unflappable composure—she's basically always calm and collected, no matter what's happening around her. She's in a relationship with Ryou, though she doesn't seem particularly invested in it; fans have noted the dynamic feels more obligatory than genuinely affectionate on her end.
Her name literally means "rainbow" (niji), which is a cute detail fans tend to appreciate even if it doesn't factor heavily into her character.
Content compiled by AnimeList.moe from publicly available sources.
