"Don't you worry about me! I'm a master of martial arts and I'm also packin' some serious heat! And as soon as Majin Buu pops his head outta that hole, he'll be eatin' a lead salad!" - "The Old Kai's Weapon"
Mr. Satan (ミスター・サタン, Misutā Satan; lit. "Mister Satan"), also known as Hercule Satan in the Funimation dub, is the World Martial Arts Champion and the Earth's protector. His real name is Mark (マーク, Māku). He's the father of Videl and grandfather of Pan.