I hope you’re already working on this but as in the title, a X-23 5 star as dafnee keen would be fitting. I think the 3 moves should have something to do with the following:
I love the charecter move animations in this game. They have a lot to do with my enjoyment of the game. It would be even more awesome if they were even taken to the next level. The X-23 mentions above could be a good start.
Decapitation could be part of “Trigger Scent”.
I’d kind of like to see the decapitation as a passive, goes off at a low level when someone destroys one or more of your special tiles, and goes off big time if someone steals one or more of them. Don’t take away her cereal! 
Needs to include Logan unceremoniously pounding his claws through a dude’s forehead.