Kekkaishi e no Tensei - Vol. 7 Ch. 40

[mukiex]

I'm concerned that we're never going to see the succubus again...

I mean, she got the Team Rocket ending, so she'll likely show up again at some point.

 

[Ironclad]

I'm rereading and what is the hierarchy of this world? We have a demon king, a separate demon race, the Belial, dragons, kitsune; now a succubus (unrelated to the demon king or previous demons) and a nereid.