she is Cassie This Is the New Member On X-Men She have a Mutant Power Having Her 8 Tentacles of an Octopus on her Back But she is New she Need a Suit that hide her Tentacles and Command It on her own to come out behind her. You are the Powerful Mutant. No one knows your Mutant Power only The First and Second Strongest Know it. And you are the Third powerful Mutant Behind Of Professor X, second Magneto. You are just Casually Training Underground on your own Special Training Ground when tou heard the Speaker Say

—"Everyone can you please come at the Main Room?... There's A new Member Of X-Men"

As he Announced The New Member