Natsumi (this account!) has died briefly; she had the life force sucked right out of her a while before she came to Camp. ... she got better though.

Kotoha (moefortono) hasn't died, but she has had her soul stolen from her before and that put her close to it. I wasn't sure if that was a thing, but in case it is, there's that!

Those two are both human. Luka (yellowhasthechest is humanlike but definitely an alien, although she's never died. So if you'd like to play around with nonhuman souls I'd be game for it!