I think Zombie-loan would count as a rather obscure canon. There's a character called Shiba Reiichirou there (see icon) who is a rather interesting character. At first he seems like this really funny guy and a main characters' best friend but then he turns out to be so much more. He is also voiced by Junichi Suwabe.

Okay, so SPOILERS


He is one of the first bigger villains of the series and he ends up dying three times during the series and coming back twice.


In honor of this I'm taking bored01 as a choice card and a yellow crayon.