Sean Cassidy known as Banshee is an Irish mutant and co-headmaster of the Xavier's School for Gifted Youngsters along with Emma Frost.[1] Little is known about his past.

Sean has a playfully contentious relationship with Emma. The pair seem to differ on teaching style; Sean is much more laid back in his teaching approach than Emma and wants to make sure that the students bond as a team.[1]

Along with Emma, Sean teachers classes and recruits new students. Together they led Generation X into the Dream Dimension to battle Russell Tresh and rescue Skin.[1]


Banshee is a mutant with powers similar to his alternate universe counterparts, including:

  • Audiokinesis: Banshee has the ability to create various sonic effects.[1]
  • Sonic Scream: Banshee can use his vocal cords to vibrate over a wide range of sonic frequencies and produce sonic screams.[1]

Portrayed by Jeremy Ratchford.

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