| Real Name: | Sean Cassidy |
| Former Aliases: | none |
| X | X |
| Height: | 6‘0” |
| Weight: | 170 lbs. |
| Hair color: | Reddish Blond |
| Eyes: | Green |
| X | X |
| First appearance: | Uncanny X-Men #28 |
| Joined the X-Men in: | Giant Size X-Men #1 |
| Last appearance: | X-Men: Deadly Genesis #2 |
| X | X |
| Known Relatives: | Maeve Rourke (wife, deceased),
Theresa Rourke Cassidy / Siryn (daughter),
Tom Cassidy / Black Tom (cousin) |
| Profession: | former Interpol agent |
| Group Affiliation: | formerly X-Corps, Generation X, X-Men, Interpol
formerly Factor Three (under mental control) |
Powers: |
manipulate his vocal chords to generate hypersonic frequencies that act as a sonic scream to shatter, liquefy or disintegrate solid matter, repels objects to shield himself or fly through the air, emit sonar pulses to map out his surroundings or scramble incoming wavelength probes, and focus his sonics at another person to render them unconscious, deafened, or experiencing nausea and dizziness, compensates for his powers with superhuman hearing and a resistance to intense sound |
