Evil Tyrant Overlord from Disgaea.
After waking up from a two-year "nap", Laharl rules over his father, King Krichevskoy's, kingdom with an iron fist!
He's stubborn, power-hungry, arrogant, a natural-born brawler, and had a weakness for humongous boobs. By weakness, I mean he gets sick by the sight of them. (Etna and Flonne are flat, so they don't bother him in that area.)
Along with Flonne and Etna, Laharl is a recurring character throughout the Disgaea Universe. He and the girls have also appeared in other games made by Nippon Ichi, such as Phantom Brave and Makai Kingdom.