Keima Masuda

Keima is the protagonist of the Lazy Dungeon Master. He is the lazy dungeon master. He was summoned into Rokuko's world from Japan as a gatcha game prize and was tasked with getting rid of the bandits that had taken up residence in Rokuko's dungeon, a normal, small cave. After craftily defeating the invaders, he becomes Rokuko's dungeon master, tasked with advancing the dungeon.