I'm willing to take a stab at it.
Name: Tina Nitus
Nickname (optional): Riot
Sexual Orientation: Bisexual
Powers: Sonic Scream
History & How did the powers come to your character: Bullied and teased in school, Tina was always the choice favorite to be picked on by others, mainly because she had scars wrapped around her throat from laryngeal surgeries when she was a child. Before the surgeries, Tina was incapable of speech, but thanks to a revolutionary surgery, was able to speak again, even if it was softer than the regular human pitch. During the senior prank, her 18th year, she was locked into a magician's clear trunk, where snakes were slowly released inside. Her worst phobia, she screamed and screamed, while trapped and her post-surgery voicebox morphed into the ultra-high pitched weapon it is today, shattering the glass around her. For four years, she's created havoc around Metropolis, able to shatter nearly any object with her vocal chords (which includes glass cases, security camera lenses, and even non-plastic guns if she screams loud enough.)
When out amongst others, she's usually wearing a scarf to hide her scars, and is very, very soft-spoken.
Never again would she be picked on for the way her voice sounded. Dedicated to using her powers only for gain and punishment, rather than help and service, Riot sometimes straddles the thin line between good and evil, almost always moving towards evil if it gives her an advantage.
Is this okay? Let me know if I should add anything.
I wonder how a sonic scream could be used during sex...