The leader of the T-Busters unit. He is a hot-blooded character whose catchphrase is usually "I'm burning up!!" but in reality, he is closer to a blustering, bearded middle-aged man. Due to his usual conduct, he is often subjected to insubordination by his team. The leader of T-Buster.

One of the T-Busters members. He is the shortest and most cowardly member of the team, but thanks to his cute appearance, he receives slightly better treatment within the group. The communications officer of T-Buster.

A member of the T-Busters. He is essentially the sub-leader and the only sane person among the members. In fact, no matter how you look at it, he seems to be the actual leader. The sniper of T-Buster.

One of the T-Busters members. He is the team's medic and engineer (plus a mad scientist). His face looks grotesque, like Frankenstein's monster. The medic of T-Buster.

One of the T-Busters members. He has a massive build and possesses incredible strength. He has a gimmick where various armories pop out of his stomach when he tenses his abs. The heavy weapons specialist of T-Buster.

An elementary school student who has a tragic fate within the story. According to the Buster team's testimony, he does his homework diligently but isn't very good at studying. His athletic nerves are particularly poor, so he seems to suffer a lot of unfair treatment during PE class.

The leader of X-Buster, who speaks politely and handles tasks accurately. He has a mysterious scar on his face and, unlike Assault, is loyal to his contractor and never slacks off. He seems slightly over-dedicated to his duties, even scolding Healer for a minor joke during a mission. The leader of X-Buster.

A member of X-Buster. She is in charge of training the X-Busters. The trainer of X-Buster.

The chef of X-Buster. He was originally the leader of a notorious space pirate gang, but after being captured by EXIT and remodeled, he became a mercenary with a caring personality. The cook of X-Buster.

The double protagonist, main villain, and final boss of T-Buster. He shares the same name as Gong Dae-jang and is a security guard living in an apartment complex. Although he holds a doctorate, he also works as an apartment security guard, which he says he was doing as a part-time job. In Season 1, Episode 9, he also seems to be the janitor at the school Gong Dae-jang attends.