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Siryn
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.
Theresa Cassidy debuted as a villain in Spider-Woman #37 (April 1981), created by writer Chris Claremont and artist Steve Leialoha. She later appeared in Fallen Angels (1987), X-Force (1991), Deadpool: Sins of the Past (1994), and Deadpool (1997).
Theresa Cassidy appeared in the 2005 Cable and Deadpool series. She later appeared in the 2006 X-Factor series. She appeared in the 2021 X-Factor series.
While Sean Cassidy was working on a deep undercover mission for Interpol, his wife Maeve gave birth to their daughter, Theresa, at Cassidy Keep, County Mayo, Ireland. Maeve later dies in an IRA bombing, and with no means to contact Sean, his cousin Tom takes care of Theresa. When Sean returns and learns of his wife's death, he is devastated. Before Tom can tell him about Theresa, Sean lashes out at Tom with his sonic scream for not having taken better care of Maeve. As Sean flies away in anger, Tom falls into a chasm and breaks his leg, leaving him with a limp. Tom swears to make Sean pay and vows to never tell him about his daughter, and raises her himself.
Tom (now known as Black Tom) trains Theresa as his apprentice in his criminal activities. As a young teen, she accompanies him and his then-partner, the Juggernaut, to San Francisco. She takes the name Siryn, aids them in a vibranium theft, and battles the original Spider-Woman. Due to her inexperience, she performs poorly in battle and is defeated by Spider-Woman again during Black Tom's temporary capture. Initially believing her to be seriously hurt, Black Tom resolves to break all association with her so that she will not be exposed to further danger. While in custody, he absolves Theresa of all responsibility for her crimes, and writes a letter to Sean explaining who she is. The X-Men bring Theresa back to their headquarters, where she is joyfully reunited with her father.
Theresa moves to Muir Island, home of the research laboratories of Moira MacTaggert, a longtime ally of Professor Xavier.[volume & issue needed] During an overnight visit to Xavier Institute, Siryn, Kitty Pryde, Illyana Rasputin, and a young Muir Island resident named Amp battle robotic duplicates of the Brotherhood of Evil Mutants after accidentally releasing them from the Danger Room. Later in the evening, Siryn gets into a fist fight with Kitty after Amp convinces her that Kitty was trying to sabotage her chances with a young man named Dimitri. After the fight is broken up by Wolverine, the girls reconcile and leave on friendly terms. She also accompanies Wolverine and Kitty when they are asked by Professor Xavier to act as bodyguards for the mutant pop-star Dazzler. Dazzler is impressed with Theresa's rendition of "Amazing Grace" and asks her to act as a backing vocalist for her concert.
On the island, Siryn starts a romantic relationship with Jamie Madrox.[volume & issue needed] This version of Multiple Man is revealed to be one of his many duplicates and not the original Multiple Man, leading to the end of the relationship.[volume & issue needed] During this time Siryn and Multiple Man travel to New York City. She and Madrox search for two members of the New Mutants: Sunspot and Warlock, who had run away from the school. Siryn and Multiple Man find Sunspot and meet the association of street-level mutants known as the Fallen Angels, and they are all transported to Devil Dinosaur's planet. They travel to the Coconut Grove, the home planet of the alien Ariel. While there, her superhuman powers are neutralized and she is made a captive by Unipar. She regains her superhuman powers and returns to Earth. She chooses to remain in the Fallen Angels for some time to help reform their criminal members.
Back on Muir Island, she briefly falls under the mental control of the Shadow King.
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Siryn
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.
Theresa Cassidy debuted as a villain in Spider-Woman #37 (April 1981), created by writer Chris Claremont and artist Steve Leialoha. She later appeared in Fallen Angels (1987), X-Force (1991), Deadpool: Sins of the Past (1994), and Deadpool (1997).
Theresa Cassidy appeared in the 2005 Cable and Deadpool series. She later appeared in the 2006 X-Factor series. She appeared in the 2021 X-Factor series.
While Sean Cassidy was working on a deep undercover mission for Interpol, his wife Maeve gave birth to their daughter, Theresa, at Cassidy Keep, County Mayo, Ireland. Maeve later dies in an IRA bombing, and with no means to contact Sean, his cousin Tom takes care of Theresa. When Sean returns and learns of his wife's death, he is devastated. Before Tom can tell him about Theresa, Sean lashes out at Tom with his sonic scream for not having taken better care of Maeve. As Sean flies away in anger, Tom falls into a chasm and breaks his leg, leaving him with a limp. Tom swears to make Sean pay and vows to never tell him about his daughter, and raises her himself.
Tom (now known as Black Tom) trains Theresa as his apprentice in his criminal activities. As a young teen, she accompanies him and his then-partner, the Juggernaut, to San Francisco. She takes the name Siryn, aids them in a vibranium theft, and battles the original Spider-Woman. Due to her inexperience, she performs poorly in battle and is defeated by Spider-Woman again during Black Tom's temporary capture. Initially believing her to be seriously hurt, Black Tom resolves to break all association with her so that she will not be exposed to further danger. While in custody, he absolves Theresa of all responsibility for her crimes, and writes a letter to Sean explaining who she is. The X-Men bring Theresa back to their headquarters, where she is joyfully reunited with her father.
Theresa moves to Muir Island, home of the research laboratories of Moira MacTaggert, a longtime ally of Professor Xavier.[volume & issue needed] During an overnight visit to Xavier Institute, Siryn, Kitty Pryde, Illyana Rasputin, and a young Muir Island resident named Amp battle robotic duplicates of the Brotherhood of Evil Mutants after accidentally releasing them from the Danger Room. Later in the evening, Siryn gets into a fist fight with Kitty after Amp convinces her that Kitty was trying to sabotage her chances with a young man named Dimitri. After the fight is broken up by Wolverine, the girls reconcile and leave on friendly terms. She also accompanies Wolverine and Kitty when they are asked by Professor Xavier to act as bodyguards for the mutant pop-star Dazzler. Dazzler is impressed with Theresa's rendition of "Amazing Grace" and asks her to act as a backing vocalist for her concert.
On the island, Siryn starts a romantic relationship with Jamie Madrox.[volume & issue needed] This version of Multiple Man is revealed to be one of his many duplicates and not the original Multiple Man, leading to the end of the relationship.[volume & issue needed] During this time Siryn and Multiple Man travel to New York City. She and Madrox search for two members of the New Mutants: Sunspot and Warlock, who had run away from the school. Siryn and Multiple Man find Sunspot and meet the association of street-level mutants known as the Fallen Angels, and they are all transported to Devil Dinosaur's planet. They travel to the Coconut Grove, the home planet of the alien Ariel. While there, her superhuman powers are neutralized and she is made a captive by Unipar. She regains her superhuman powers and returns to Earth. She chooses to remain in the Fallen Angels for some time to help reform their criminal members.
Back on Muir Island, she briefly falls under the mental control of the Shadow King.