Great Tree Eniyunien is a spirit embodying the rumors and legends surrounding the "Great Tree of Learning"—and he basically is the Spirit School itself.
He's got the raspy voice of an old man and comes across as pretty laid-back overall. But get him in a teaching situation and he lights up; he genuinely gets excited when students ask questions. That said, he's oddly defensive about his work as an instructor. Mess with his drawings or criticize his teaching methods and you'll see him get genuinely upset. It's one of his quirks—super passionate about education, but can't take feedback on his presentation skills.
Content compiled by AnimeList.moe from publicly available sources.
