The main protagonist of KonoSuba. A sixteen-year-old Japanese teenager who became a game-obsessed shut-in after having his heart broken over his childhood friend during middle school. He is sent to the parallel reality after dying from acute stress reaction, forcing Aqua to come with him after she irritates him with her attitude. Kazuma is classed as an Adventurer which, despite being the lowest ranked class, allows him to learn various skills from other classes, albeit at an increased cost. With his ability, Kazuma learns basic skills such as stealing, archery, monster detection, and basic magic. (Source: Wikipedia)

Tsugumi is a hitwoman who was raised and trained by Claude of the Beehive Gangsters.Tsugumi is originally introduced as a guy who transfers to Chitoge's class, and has orders to protect her from Raku, whom she thinks forced Chitoge into the relationship. She and Chitoge are childhood friends; she tries to keep a ten year old promise of becoming strong to protect Chitoge. However, after Raku treats her nicely, she begins to develop some feelings for him, even though she is too stubborn and embarrassed to admit it. In America, her assassin code name is "Black Tiger," who had a rivalry with "White Fang." She does well academically, having ranked next to Chitoge on a yearly exam. (Source: Wikipedia)