|Appeared in||X-Men: First Class|
|Status|| Alive (Original Timeline)|
Unknown (presumably deceased; New Timeline)
|Actor||Caleb Landry Jones|
- "You like fish, I like fish, too. Maybe we should get a bite sometime and talk about it."
- ―Sean Cassidy [src]
Sean Cassidy, also known as Banshee, is a mutant with the ability of superhumanly powerful lungs, throat, and vocal cords could produce a sonic scream for various effects, in concert with limited, reflexive psionic powers which directed his sonic vibrations. He can hover or fly at the speed of sound.
Sean Cassidy is a mutant with the ability to create powerful sonic waves with his voice. In 1962, he was recruited by Charles Xavier and Erik Lehnsherr in order for him to join their team of mutant peacekeepers they were forming for the CIA.
After the Hellfire Club tried to recruit them, Sean and the others relocated to Xavier's mansion where they began training to defeat Shaw. Xavier taught him how to control his ability and use it to fly by using a harness developed by Hank McCoy.
During the Cuban Missile Crisis, when the team assembled to finally confront the Hellfire Club, faced Angel alongside Havok.
Powers and Abilities
- Mutant Physiology: Banshee is a very powerful mutant who possesses the power to generate and manipulate powerful sound waves.
- Super Sonic Scream: Banshee has superhumanly powerful lungs, throat, and vocal cords, he can produce a sonic scream for various effects, in concert with limited, reflexive psionic powers which directed his sonic vibrations. He also has the ability to use it underwater for sonar.
- Sound Wave Generation: Banshee can generate, create and project powerful sound waves.
- Sonokinesis: Banshee can manipulate sound waves.
- Flight: Banshee can hover or fly at the speed of sound.
- Thomas Cassidy - Cousin.
- Charles Xavie/Professor X - Friend and mentor.
- Moira MacTaggert - Friend and Teacher.
- Armando Muñoz - Friend and teammate; deceased.
- Alex Summers - Friend and teammate; deceased.
- Hank McCoy - Friend and teammate.
- Angel Salvadore - Friend and teammate turned enemy; deceased.
- Sebastian Shaw - Enemy; deceased.
- Janos Quested - Enemy.
- Emma Frost - Enemy; deceased.
- Azazel - Enemy; deceased.
- Erik Lehnsherr - Former teacher turned enemy.
- Raven Darkholme - Friend and teammate turned enemy.
Behind the scenes
- Irish actor Robert Sheehan was originally cast as the character but dropped out due to commitments to Misfits.
- In the comics, Banshee is from Ireland, in the film, Cassidy is American.
- A ginger mutant with a gag on is seen in X-Men Origins: Wolverine, it was assumed that this mutant was Banshee. However, Banshee is said to have died before the events of X-Men Origins: Wolverine.
- In the comics, Siryn is his daughter. However, Banshee (supposedly) died before 1973 making it almost impossible for the film version to be his daughter.
- Earth-10005 (3 films)