Farooq Gibran

Farooq Gibran, posthumously dubbed Blackout by Cisco Ramon, was a citizen of Central City affected by the aftermath of the S.T.A.R. Labs particle accelerator.

Particle accelerator accident
Farooq and his two friends, Daria Kim and Jake Davenport, were all out to witness the particle accelerator being activated. In hopes of getting a better view, Farooq climbed an electrical tower, despite his friends protests for him to come down. When the accelerator was activated, he was electrocuted by the tower channeling the electricity from the explosion. His heart stopped and his friends tried CPR on him. But he was transformed by the particle blast and became capable of siphoning electricity. The electricity in his body emerged when he resuscitated, killing his friends. He blamed Harrison Wells for the death of his friends.

Meeting The Flash
Months later, Farooq reappeared in Central City, and murdered someone via his electrocution powers. The Flash confronted Farooq at a power station. Farooq, using his powers, was able to siphon The Flash's energy, causing The Flash to lose his powers. Farooq subsequently appeared at S.T.A.R. Labs, wishing to get revenge on Harrison Wells for creating the Particle Accelerator and changing him. Wells decided to release Tony Woodward to try to get him to kill Farooq, but Farooq was too powerful and he ended up killing Tony. In the S.T.A.R. Labs parking garage, Farooq gets the confrontation he wished for and is just about to kill Wells when The Flash gets his powers back and transports Wells to safety. The Flash, more connected to his speed than ever, is able to resist Farooq's power siphoning, and as a result, Farooq is apparently killed by overloading his power. Farooq is placed in a body bag and put into one of the S.T.A.R. Labs cells. Wells later opened the cell to get a sample of Farooq's blood in order to see just how Farooq was able to siphon The Flash's powers.

Powers and Abilities
Electrokinesis: Farooq developed the need to absorb energy for sustenance, but could also manipulate the electricity he absorbed or was in contact with. His power was so effective that it absorbed all the electrical based energy from Barry Allen's body and remove his powers. And the offensive application of his powers proved to be lethal enough to overpower Tony Woodward while protected by his organic steel skin and subsequently kill him, although that may have been because metal is a high electric conductor. His presence could also effect and deactivate all electrical devices in an area. He is not only highly electromagnetic, but he could also sense electricity, even the bio-electricity in human bodies, making it possible that he could absorb it from humans, though this was not demonstrated.

Weakenesses
Overload: Possibly since he is still made of flesh, a high enough level of energy was able to seemingly burn him from the inside and kill him. Barry had mentally accessed more of his power and therefore generated so much more energy than he did when he lost his powers to Farooq the first time. The second time Farooq tried absorbing The Flash's powers, it overwhelmed him and his skin and head glowed yellow with the massive energy surges in his body until he died, nullifying all the energy in him.

Trivia

 * In the DC comics, Farooq is not a supervillain as portrayed in the show, but a superhero only existing in the Flashpoint alternate reality.