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Banshee (Sean Cassidy) is a Marvel Comics superhero, a member of the X-Men. Created by writer Roy...

Banshee (Sean Cassidy) is a Marvel Comics superhero, a member of the X-Men. Created by writer Roy Thomas and artist Werner Roth, he first appeared in X-Men #28 (January 1967). An Irish mutant, Banshee possesses a "sonic scream," capable of harming enemies’ auditory systems and causing physical vibrations. He is named after the banshee, a legendary ghost from Irish mythology, said to possess a powerful cry, although the banshee spirit is invariably female, a fact which the character's creators didn't realize. A former Interpol agent and NYPD officer, Banshee was always a decade older than most of the X-Men and had only a relatively short tenure as a full-time X-Man. He was, however, a mentor of the 1990s-era junior team Generation X. Sean Cassidy is the heir to both a small fortune and a castle in Cassidy Keep, Ireland, where he was born. In his youth, he marries Maeve Rourke and takes a job with Interpol as an Inspector. While Cassidy is away on a long mission, his wife discovers she is pregnant and gives birth to their daughter, Theresa Cassidy. Not much later, Maeve dies in an IRA bombing. With no means to contact Sean, his cousin Tom takes care of Theresa. When Sean returns to