Madeline Pryor? Nocturne? Minor? Compared to Wolverine maybe....
I see them is more like B-list or C-list characters. The X stories have so many characters that literally only got seen once. In X-statix most one-offs got killed, but not all of them. Also... resurrections thingy.
having a character like Ocean show up on Krakoa would be IMO more interesting than Nocturne. She's a hydrokinetic mutant.
https://marvel.fandom.com/wiki/Ocean_(Earth-616)