Sylar

Sylar is a character and a villain from the t.v show called Heroes Universe.He has the ability to "work things out" (to understand how things work by just looking at them), and but his power comes with a 'hunger' (as it is called in the show) for other peoples powers. Originally, he had to cut peoples peoples heads off and examine their brains to take their powers, but he eventually "worked out" that he can duplicate powers of people without killing them. He continued to kill his victims however, as he found it fun.

When hearing Khan, Sylar decided to join him.