Sean Cassidy, or Banshee, is the wailing mutant from Ireland. His sonic powers allow him to fly, hypnotize, and blast evil mutants away with a single yell. A former member of the X-Men, he now heads Generation X along with the White Queen. How long will they be able to work together without screwing, fighting or killing each other is beyond me. But until then the school will go on, and this irish mutant will continue to scream!