Tsukiko
Tsukiko is Senya's partner, though she struggles with her role more than she'd like to admit. She's naturally timid and reserved, the kind of person who tends to fade into the background. What most people don't realize is that she's quietly in love with Senya—something that clearly weighs on her whenever they're together.
Her best-known trait is her tendency to jump in and help Senya whenever she can, but she's usually the first to worry that she's making things worse instead of better. Fans often note that her anxiety about messing up becomes a self-fulfilling prophecy, creating more problems than she solves. It's one of the more sympathetic aspects of her character—she genuinely wants to be useful, but her own doubts keep getting in the way.
Content compiled by AnimeList.moe from publicly available sources.