| Siryn | |
|---|---|
 Theresa Cassidy / Siryn. Art by Ryan Sook. | |
| Publication information | |
| Publisher | Marvel Comics |
| First appearance | Spider-Woman #37 (April 1981) |
| Created by | Chris Claremont (writer) Steve Leialoha (artist) |
| In-story information | |
| Alter ego | Theresa Maeve Rourke Cassidy |
| Species | Human mutant |
| Team affiliations | X-Factor Investigations Muir Island X-Men X-Corporation Fallen Angels X-Force |
| Partnerships | Black Tom Cassidy Juggernaut |
| Notable aliases | Tracy Cassidy Morrigan Banshee Siryn |
| Abilities |
|
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]
- ^ Gerber, Jamie (May 16, 2017). "X-Force: 15 Team Members Who Could Be In The Movie". Screen Rant. Retrieved January 26, 2023.
- ^ Staff, CBR (September 29, 2018). "X-Men: The Most Powerful Secondary Mutations, Ranked". Comic Book Resources. Retrieved January 26, 2023.
- ^ Harth, David (December 18, 2019). "X-Men: 10 Mutants With The Same Powers". Comic Book Resources. Retrieved January 26, 2023.
- ^ 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.