Beerus

Beerus (ビルス), also known as the God of Destruction Beerus(破壊神ビルス), is the main antagonist in the movie Dragon Ball Z: Battle of Gods and a supporting protagonist in Dragon Ball Z: Resurrection of F. A powerful, confident, and downright obsessive hothead, he is the God of Destruction within the Seventh Universe and, as such, his occupation is to maintain balance by destroying planets.

Biography
Beerus is an entity that has been around since the Cretaceous period, which he alluded to when he mentioned killing off the dinosaurs. Since dinosaurs exist in the present-day DragonBall world, it's hinted that he's not as thorough in his destruction as other villains. Beerus was the one who convinced Frieza to wipe out the Saiyan race, as he found them to be uncultured barbarians that the universe would be better off without. Just about every otherworldly entity is scared of Beerus due to his temper (even Frieza showed fear of him in his Golden form), though since he lets so many of them live in peace, he's clearly got a sense of mercy underneath his fearsome exterior.

Despite his reputation as the God of Destruction and his overwhelming power, Beerus is actually quite charming and laid back. When he invades Earth, he joins in Bulma's birthday party and manages to win over everyone. He's even compassionate enough to spare the Earth if Oolong can beat him at rock-paper-scissors. Like Goku and Buu, Beerus loves food and will sample anything he can, losing his temper when Buu eats all the pudding before he can try some.

When Beerus decides to destroy the Earth, Goku manages to turn into a Super Saiyan God and fights Beerus. Beerus is still stronger than Goku when using his 70% power, but Goku refuses to stop if it means losing his home world. Eventually, Beerus decides to spare the Earth, his only reason being that he didn't have the motivation to follow through on his threat but was revealed because of the tasty food on Earth in the extend version.