YMMV: Haibane Renmei
- Crowning Music of Awesome: The entire soundtrack...typical for Ko Otani.
- Everyone Is Jesus in Purgatory: There are legitimate reasons to consider it to be taking place in purgatory in this case.
- Fanon: Yoshitoshi ABe purposely left a lot of the series unexplained, so that people could develop their own theories about the characters and about the world in which the story takes place.
- Superlative Dubbing: The English dub has been quite praised by fans and critics of the show.
- Viewer Gender Confusion: Some viewers initially mistook Kana and Kuu for boys. It's not just viewers, some characters are confused, too.