Okay, I've made several attempts at this, so I'm just going to do something I don't do very often: a WIP

Name: Macey Elliot
Codename: Scream
Age: 29
Gender: Female
Place of Birth: Birmingham, England
Affiliations: (Department of Superhuman Affairs)
Occupation: Technician
Appearance: WIP 
[hider=Scream][img=http://i.imgur.com/tCU7Zsd.jpg][/hider]
Powers: Macey has the ability to use her voice in ways ordinary humans are unable to. She can flawlessly impersonate any sound she has heard before, she can utilize echolocation,she can emit a scream so loud it can deal physical force to objects, or deafen them, if she so wishes. Though she doesn't quite have the skill down yet, it is also possible for her to amplify or cancel out other sounds by creating the same sound in/out of phase.
Skills: Her experience as a sound engineer, and as a technician gives her some technical know-how, especially in the fields of communications, speakers or public address systems.
Equipment/Resources: WIP
Weaknesses: Her throat is her entire power. Disrupt/damage her vocal cords, and she's next to useless. Her powers also require breath. Absence of oxygen, or any situation where she needs to hold her breath (like being submerged in water for too long), whilst not stopping her from using her powers, will put her in a disadvantageous position, as she will have to conserve her breath.
Also, overuse of her power may lead to a sore throat, which will make her power both weaker and less reliable.
Psychological Profile: WIP
Biography: WIP (Lived in Birmingham. Deliberately didn't speak much out of fear. Was a roadie for a rock band. They moved to the states. They split up. She accidentally revealed her power. Got fired from every job she tried to apply to, from either accidental misuse of power, or just plain prejudice. Attempted to get places in both the DSA and the league. Did she get them? Maybe I should drop the DSA thing entirely.)