Sunday, February 7, 2010


Siryn (Theresa Rourke Cassidy) is a Marvel Comics superhero, associated with the X-Men. Like her father, the X-Men’s Banshee, Siryn is an Irish mutant, who possesses a "sonic scream" capable of incapacitating and injuring an opponent's hearing and sending powerful vibrations through the air. She can use these vibrations to fly. Her name refers to the Sirens of Greek mythology. Siryn was raised by Banshee’s cousin and arch-nemesis Black Tom Cassidy without Banshee's knowledge. By her early teens, she left Black Tom and joined the X-Men offshoots X-Force and X-Factor.

Siryn is a mutant who possesses sonic powers similar to those of her father, Banshee, although she is able to use her powers in ways that Banshee apparently cannot. Like her father, she has the ability to emit high-decibel "sonic screams" to create various sonic effects with her vocal cords. She can also vary the pitch to deflect projectiles, and she even used it to deflect lasers once. She possesses an enhanced sense of hearing and can use her voice for echolocation to detect objects. While screaming, Siryn is able to fly at the speed of sound. Siryn has especially potent sonic attacks. She can shatter objects; project concussive blasts of sonic force (a "sonic lance"); or cause immediate pain, nausea/vomiting, and unconsciousness. She has shown a degree of resistance to what would be harmful and painful sounds and vibrations to normal humans or mutants without sonic-based powers. She also possesses psionic powers to create a force field that protects her against her own sonic vibrations to assist her ability to fly, and to help direct her sonic powers.

She is vulnerable to losing the ability to use her power effectively by overstraining and overusing her sonic screams or injury to her throat and vocal chords. She also lacks fine control of her abilities when in extreme distress: screaming in pain during her pregnancy, she unwillingly shattered every window in the complex, causing the medical staff to writhe in agony.

Unlike her father, Siryn is able to influence and control other human beings with her sonics, as well as cause them to enter a hypnotic state. Siryn can also cause the intended person to fall in love with her without regard to gender or sexual orientation and carry out her wishes and commands, like mythical Sirens. Siryn once utilized this ability on Spider-man, forcing him to divulge the truth about the Decimation of the mutants.

In addition, she can also prevent others from hearing external sounds by a certain vocal pitch so that she can secretly deliver messages to them.

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