Koizumi Yakumo is a foreign English Literature instructor at Tokyo Imperial University who's become obsessed with Japanese folklore and supernatural research—arguably more deeply invested in it than a lot of actual Japanese people. He's the type to get genuinely excited talking about mononoke and local ghost stories, which tracks with his reputation as an enthusiastic (some might say intense) researcher in the field.
Personality-wise, he's a lot. He's loud and dramatic, prone to getting carried away in conversation and tends to overstep social boundaries without meaning to. But here's the thing: he's genuinely well-mannered underneath all that, and he knows how to read a room. When things get awkward or tense, he can usually smooth it over with charm and sincerity. It's a weird combination that somehow works.
Content compiled by AnimeList.moe from publicly available sources.
