@GrimSmiles: I mean, Toga's just as into Uraraka as she is Deku, and Uraraka seems to at least care about her if recent manga chapters are to be believed. So there is some basis there.
Hieda no Akyuu is actually one of the most important characters in Touhou lore, even though she doesn't really appear in the games because she's a chronicler, not a fighter.
Oh yeah, and canonically she's probably gonna die before she even reaches thirty. That's kind of a bummer.