Kochou
She's one of the two second-year prefects in the Black Dogs dorm and Teria's twin sister. Best known for her expertise in pharmacy and medicines, Kochou's the more outgoing of the pair despite both twins being unusually young for their year—they're only 14, having skipped grades thanks to being genuinely smart. She affectionately calls Airu Inuzuka "A-chan," and there's definite chemistry there if you read between the lines. Don't let their small stature fool you; these two earned their prefect positions fair and square.
Content compiled by AnimeList.moe from publicly available sources.