I ran into an old folder on my hard drive and I had a bout of nostalgia coming along.
Gabriel Gray (alias Sylar, after his favorite brand of wristwatch) is the main antagonist of the Heroes series. He was once a casual watchmaker until he was visited by Chandra Suresh who identified him as Patient Zero, and revealed advanced humans to him. From there on, Sylar became a serial killer by examining other advanced human’s brains to replicate their power, killing them.
Initially, he had a talent for knowing how things worked simply by looking at them. He was clever, but not the kind of superpower he dreamed of. When Chandra Suresh approached him and told him about his theories, Gabriel felt his destiny was going to be fulfilled. But, after tests, Chandra told him he had no special abilities, Gabriel then stormed out but not before taking a file on Brian, a telekinetic. Gabriel calls Brian and asks him to come to his shop, He introduces himself as Gabriel Sylar and after talking to Brian he discovers his ability of being able to know how things work just by looking at them; the ability is called Intuitive Aptitude (Perceptive Replication). Gabriel then kills Brian and takes his power and after trying to hang himself due to guilt, he is told by Elle to meet other evolved humans, one of them being Trevor. Elle was on a mission for the company to make Sylar use his ability and so she constantly referred to Trevor as being special, causing Sylar to become infuriated and attack Trevor.
After killing Trevor he began his killing spree to collect as much power as possible.