Sean "Banshee" Cassidy (November 3,1966) This Day In Comics
Sean Banshee Cassidy November 31966 <a href=httpswwwcomicbookaddictscom202309bishop 1981 this day in comics>This Day In Comics<a>

Sean “Banshee” Cassidy (November 3,1966) This Day In Comics

An Irish mutant, Sean Cassidy possesses a “sonic scream”, capable of harming enemies’ auditory systems and causing physical vibrations. He is named Banshee after a legendary ghost from Irish mythology, said to possess a powerful cry. A former Interpol agent and NYPD police 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. 

 The X-Men #28 - The Wail of the Banshee released by Marvel on January 1, 1967
<em> <em><a href=httpscomicvinegamespotcomthe x men 28 the wail of the banshee4000 9098>The X Men 28 The Wail of the Banshee<a><em> released by <em><a href=httpscomicvinegamespotcommarvel4010 31>Marvel<a><em> on January 1 1967<em>

He first appeared in X-Men #28 (November 3,1966) as an adversary to the X-Men under coercion, but soon befriended the team. Banshee is a mutant whose superhumanly powerful lungs, throat, and vocal cords can produce a sonic scream for various effects, in concert with limited, reflexive psionic powers which direct his sonic vibrations. He can hover or fly at the speed of sound, and can carry at least one passenger.