Litte Ratus is a teacher at the academy in the anime Prism Ark. She also serves as a magic instructor, as she is regarded as a powerful magic user in her own right. Despite her small stature and a personality that can come across as somewhat childish, she dislikes being treated like a child and insists on being respected as an educator. This discrepancy leads the protagonist Hyaweh to wonder if she is going through a phase where she wishes to be seen as an adult. Her choice of weapon consists of two floating spheres known as Bud and Fys, described as Directivity Automagically Floating Prisms. She is a native of Windland, with mint‑green hair and green eyes. Late in the story, Litte Ratus is revealed to be spying for the antagonist Judas, a development that adds complexity to her role. Her motivations revolve around maintaining her authority and proving her competence, though her eventual allegiance to Judas suggests deeper loyalties or pressures that are not fully explored in the available material.