Kazuma Satou

Kazuma Sato (佐藤 和真, Satō Kazuma) is one of the main characters of Isekai Quartet. He is an adventurer from the KonoSuba universe. He is the brought to the KonoSuba universe following his death, making him the isekai character.

Personality
A young adolescent who rather laze around, relax, and do whatever he likes. Due to his companions antics, he is rather stressed and is somewhat impatient. Valuing his laziness and enjoys the relaxing days of this new world. Upon entering it he is more relaxed and shows some initiative in talking with others. Though while he doesn't hate this new world or the new classmates, he finds it very strange with those like Tanya and Ainz being students.

Plot
When the groups are split up, he is placed with Tanya and Demiurge.

Powers & Abilities
Kazuma is the Adventure Class, the weakest of all in his world. However while weak he is very cunning and knows how to plan. Being useful on the field and provides more support among his less than useful teammates.

Steal: Kazuma has the power to steal from others. Though due to the nature of the world it becomes slightly more difficult to use Steal on certain beings or people.

Stealth: He can hide himself using Stealth and becomes undetectable to the average person. Of course certain people are capable of seeing him.

Luck: His one good stat which he takes pride in, functioning with his Steal. While it was originally restricted because of the new worlds rules, his luck is still very high in certain cases, like when aiding Tanya in crippling the Mobile Fortress Destroyer.

Subaru Natsuki
He declares Subaru his rival, due to the fact that, while their circumstances are similar, Sabaru has the cushier life style. Kazuma is unaware of the hardships Subaru had to go through to get that lifestyle, like dying several times.

Tanya
Kazuma finds Tanya to be a evil girl from a war world. Being rather scared of her alongside Demiurge and faces her wraith when attempting to do nothing in the Fied Day games. Still, Tanya does respect his values and admits to finding him useful on the field. Stating herself if they were back in her world, she'd have forced him into the military.

Ainz Ooal Gown
A monster he found shock in being a student, and like Subaru and Tanya is surprised he was also an Isekai person. Still, they seem to be on good terms with Kazuma protecting him and his Guardians from Aqua purifying them and even from newcomer Raphtalia.

Kazuma Gang
His party members consisting of Aqua, Darkness, and Megumin. While friends with them, he finds them very annoying and each of them useless in some form. Stating how all of them suffered through thick and thin at times with the girls making fun of him. His stress and impatience comes from their attitude and antics.

Demiurge
He sees him as the literal Devil, and is somewhat scared of him. Unaware that the Demon took control of his body and is shocked when he and Tanya agreed with more rules.

Raphtalia and Naofumi
He met Raphtalia when she met him and Ainz and told her that Ainz wasn't a bad monster. The two agreeing to help her out locating Naofumi. He considers the Shield Hero's situation to be 'Hard Mode' when hearing of his adventure but overall, doesn't have much interaction with him.

Trivia

 * It is revealed by Kris that if he dies in this world, she can't revive him.