Flux
Age: 20
Height: 6'0"
One seemingly peaceful night, Glimmer was ambushed by an assassin. The battle was short, with Glimmer clearly having the upper hand. The would be assassin retreated. Glimmer didn't think much of it. Little did she know that the assassin wasn't out to kill her, but get her blood. The DNA was fused together with the DNA of a secretive CEO of a massive biotech company in a misguided attempt to create a child and heir to his riches.
Flux was that child. She is gifted with many of Glimmer's abilities plus the cold, unwavering will of her father. She shares an unsettling resemblance to Glimmer (and therefore Borealis). One particular ability unique to Flux is the ability to turn her body into living lightning. She can use this to quickly and stealthily travel the city using the power lines. It is also useful for avoiding attacks and absorbing energy based damage. She can control magnetic fields up to 30 yards and create lightning bolts from her finger tips. Her speed is remarkable, traveling as fast as lightning in short bursts in open air. While Flux is fast and has decent range, she is not very sturdy. A gun shot wound would be extremely painful if it managed to hit.
Flux started out in the most prestigious schools, the best tutors, and a full schedule of extra-curricular activities. At a young age, her ego was already massive. By the time she hit her teenage years, no one could tolerate being around her. This isolation made her a bit crazy. Once she realized she could take what she wanted using her powers and no one would stand her way, Flux quickly fell into a life of crime. She takes what she wants, when she wants, and no there are few who can stand in her way.
(My apologies to the artist's image I butchered)