Gallagar

ギャラガー

Also known as Gigaboss is english dub. Gallagar is a leader of the Death Metal Empire and main antagonist in the series. Gallagar is an eccentric, but ruthless leader. For the majority of the series, he's seen as an overlord, but is also seen to be asking his subordinates to play menial games or attend parties. (Source: Legends of the Multi Universe Wiki)