Siryn
| 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 |
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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). 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. 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.