Korg (Marvel Cinematic Universe)

Korg is a character in Thor: Ragnarok, he is a Kronan gladiator who resided on Sakaar and led a rebellion and stole the Statesman (one of the Grandmaster's spaceships) along with Loki and the rest of his rebellion and joined Thor on his trip to earth.

Personality
Korg is shown to be very friendly and nice even to complete strangers like Thor and Loki, he is also quite jokey.

Thor: Ragnarok
he meets Thor on Sakaar along with his friend Miek, Korg makes a joke about rock-paper-scissors after meeting Thor when he watches Thor and Hulk he is frightened and reminded of his old (and dead) friend, Doug's battle.

later in the film, Valkyrie recruits Korg and he leads a rebellion to escape Sakaar, while walking to steal a spaceship, he encounters Loki on the floor (Thor had electrocuted him) and Loki joins the Rebellion and they steal the Statesman (one of the Grandmaster's spaceships) and goes to asgard and they got all off the spaceship and they fight the beserkers

at the end of the climax, they all go on the Statesman as Asgard is destroyed by Surtur and Hela is killed, Korg then joins Thor on his way to earth

Trivia

 * he and Miek are the first gladiators that Thor meets in the film.