Siryn

Siryn
Theresa Cassidy / Siryn.
Art by Ryan Sook.
Publication information
PublisherMarvel Comics
First appearanceSpider-Woman #37
(April 1981)
Created byChris Claremont (writer)
Steve Leialoha (artist)
In-story information
Alter egoTheresa Maeve Rourke Cassidy
SpeciesHuman mutant
Team affiliationsX-Factor Investigations
Muir Island X-Men
X-Corporation
Fallen Angels
X-Force
PartnershipsBlack Tom Cassidy
Juggernaut
Notable aliasesTracy Cassidy
Morrigan
Banshee
Siryn
Abilities
  • Superhuman voice granting:
    • Superhuman voice stamina
    • Hypnotic voice
    • Sonic scream
    • Sonic shield
    • Sonic beam
    • Sonar
    • Flight
  • Various undefined mystical abilities since becoming Morrigan

Siryn (Theresa Maeve Rourke Cassidy) is a superhero appearing in American comic books published by Marvel Comics. Created by writer Chris Claremont and artist Steve Leialoha, the character first appeared in Spider-Woman #37 (April 1981).[1] Theresa Cassidy belongs to a subspecies of humans called mutants, who are born with superhuman abilities. She possesses a sonic voice providing various effects while her name refers to the Sirens of Greek mythology and their hypnotic voices.[2][3] She is depicted most commonly in association with the X-Men. Theresa Cassidy is the daughter of the superhero Sean Cassidy. The character has also been known as Siryn and Banshee at various points in her history.[4]

  1. ^ Gerber, Jamie (May 16, 2017). "X-Force: 15 Team Members Who Could Be In The Movie". Screen Rant. Retrieved January 26, 2023.
  2. ^ Staff, CBR (September 29, 2018). "X-Men: The Most Powerful Secondary Mutations, Ranked". Comic Book Resources. Retrieved January 26, 2023.
  3. ^ Harth, David (December 18, 2019). "X-Men: 10 Mutants With The Same Powers". Comic Book Resources. Retrieved January 26, 2023.
  4. ^ Davison, Josh (June 20, 2020). "X-Men: 5 Times Banshee Was The Best Mutant (& 5 She Was The Worst)". Comic Book Resources. Retrieved May 20, 2023.