She comes from a long line of saints—literally—and is widely considered one of the greatest to ever do it. Her powers are legit, built through intense training and discipline, but there's a catch: she's kind of awkward socially and people find her off-putting. The consensus around her is basically "yeah, she's perfect, but in an unsettling way." Her saving grace is her younger sister Mia, also a saint, whose warmth seems to balance out her intensity. The two work together on their saintly duties, and Mia's presence makes the whole thing actually work.
Content compiled by AnimeList.moe from publicly available sources.