Kazuma Satou

Kazuma Sato (佐藤 和真, Satō Kazuma) is one of the main characters of Isekai Quartet. He is the main protagonist from KonoSuba. A Shut-in NEET who died and is the brought to a fantasy world by the goddess Aqua who he ends dragging with him. In his Isekai world, he is an adventurer leading a party sent out on a quest to defeat the Demon King. In the Isekai Quartet World, he is a student of Class 2 and a member of the Disciplinary Committee.

Appearance
Kazuma is teenage boy with an overall average appearance. He has short and slightly spiky chestnut-brown hair and green eyes. In the Isekai Quartet world, he wears his adventurer gear which consists of a gold-trimmed green mantle, white shirt, pants and leather boots.

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.

He was notoriously known to several (including his party members) as a pervert. First, Chris was uncomfortable whenever he recalled that he stole her underwear. Second, he peeked to stare at bikini-wearing ladies during the beach trip resulting in Tanya and Demiurge to keep him on leash. Third, when Vanir exposed the teenager's intention to sneak into the nurse's office to peek at the female students, Naofumi looked down on the boy for such attempt.

He's a bit of a trickster: First, he equivocated to Grantz, Neumann, and Koenig that the giant toads were not strong. Second, he tricks Captain Weiss in what to do on Valentine's Day.

Plot
When going over loot from a previous quest, they discovered a mysterious button. Megumin presses the button and they are transported to the world of Isekai Quartet. When the groups are split up, he is placed with Tanya and Demiurge as part of the disciplinary committee.

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

As an adventurer from his world, he obtain many skills and abilities to assist his party or plans. The list of skills and abilities he showed in Isekai Quartet so far are:
 * 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. It doesn't work on Reinhard, due to his divine protections.


 * Stealth: He can hide himself using Stealth and becomes undetectable to the average person. Of course certain people are capable of seeing him.
 * Snipe: A skill that is dependent on one's luck stat. This gives Kazuma incredible accuracy when using a bow and arrow. In the Isekai Quartet world, he uses a sling shot with this skill.

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.

Kazuma's Party
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. He suffered through thick and thin at times with the girls while they often make fun of him. His stress and impatience comes from their attitude and antics. This doesn't change much in the Isekai Quartet world, where he often feels embarrassed and humiliated by his party's idiotic behavior towards the other classmates and would sometimes try to reel them in before they do anything more embarrassing. He also is not above going against his party on the idea to returning to his original fantasy world as finds the Isekai Quartet world less stressful.

Despite this, he expressed joy when his party members gave him valentine chocolates.

Chris
Prior to the events of Isekai Quartet, Chris had taught Kazuma the Thief skill of Steal and he stole her panties. He also discovered she is the human identity of Eris. Chris also brought Kazuma back from the dead back in Konosuba.

He likes to tease over the time he stole panties.

Vanir
Vanir was a former enemy of Kazuma's and a constant thorn in his side back in Konosuba.

Kazuma was shocked to find Vanir somehow ended in this new world when the devil was competing with the teachers (including Roswaal and Mr. Rerugen) against his team in the cavalry game in field day.

During physical examinations, Vanir exposed the boy's intention of having a gaze "at a scantily-clad classmate".

Subaru Natsuki
Both were able to immediately identify each other as humans from another world although they point out their respective means of transporting to their isekai world is different. They originally shared a mutual bond out of how they were both originally Shut-in NEETS who came to their respective Isekai-world in a tracksuit. He declares Subaru his rival, due to the fact that, while their circumstances are similar, Subaru has the cushier life style. Kazuma is unaware of the hardships Subaru had to go through to get that lifestyle, like dying several times. Although he kinda cut their friendship short, he's still willing to cooperate with him during the Sports Festival and display concern for his well-being.

Ram
Due to drawing names for the "Test of Courage" activity; Kazuma teamed up with Ram, Albedo, and Demiurge.

Kazuma was shocked and angered at Ram for ratting him, Aqua, and three of Tanya's men to Roswaal for their attempt to steal from the principal.

Julius
In field day, Kazuma admitted to wanting to hurt Julius the moment they met. The teams of Kazuma and Julius competed against each other in the cavalry game ending in a stalemate before the teachers (consisting of Roswaal, Vanir, Mr. Rerugen, and one other whom Ainz recognized) entered the competition. After the two teams of students formed an alliance, Julius used light magic to shield Kazuma's team and Chris used Bind on Mr. Rerugen. After the Mobile Fortress Destroyer entered the scene, Julius' team handled the teachers while Kazuma's team took on the Destroyer.

When Kazuma and his party were working part-time in the convenience store, he handled the transaction as Julius proceeded to the check out.

Tanya von Degurechaff
Kazuma finds Tanya to be an evil girl from a war world. They both are fellow members of the Disciplinary Committee. He is rather scared of her alongside Demiurge and faces her wrath when attempting to do nothing in the Field 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.

Imperial 203rd Aerial Mage Battalion
Aside from Viktoriya Ivanovna Serebryakov and Matheus Johann Weiss, is shown to get along with Wilibald Koenig, Rhiner Neumann, and Vooren Grantz. He collaborated with these three members of Tanya's battalion and later Aqua by trying to acquire some red wine from the Principal's office. Despite this, he's not above using them for his own gain as he lets them and Aqua get attack by Giant Toads to avoid getting eaten himself while taking the alcohol himself.

The three members are now more aware of his overall mischievous nature as they already deducted that Kazuma tricked Weiss on how to get Valentine chocolate.

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.

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

Albedo
While Albedo doesn't really care about Kazuma, Kazuma is willing to come to her defense whenever she and Aqua interact and about to start a fight. He became interested in her after hearing that she was a succubus and asked if she can induce erotic dreams like the succubus from his Isekai world. He then finds her a weirdo when seeing her with the Archbishop of 'Love'.

Naofumi Iwatani
Kazuma first saw Naofumi when the Shield Hero entered his classroom, but soon left without saying anything. When he and Ainz encountered a half-raccoon demi-human girl (who was looking for Naofumi), they listened to her telling them what the Shield Hero had been through until the present.

During medical examinations, Kazuma replied to Naofumi's question, "No, but yeah! Maybe!" Subsequently, the boy caused the Shield Hero to have a bad impression on him after Vanir exposed his dirty intention. Unknown to Kazuma, Naofumi could see someone the Shield Hero had known in him.

During the school festival and before Class 2's performing the adaptation of Cinderella, Kazuma mocked Naofumi (who was about to play the titular character of The Ugly Duckling), "Oh, that poor bastard".

Raphtalia
When Kazuma and Ainz encountered the half-raccoon demi-human girl (who drew her sword upon seeing Ainz's undead appearance), he talked her through, "Hey, slow your role. You've been transported to another world, okay?  Things are a little different here, so just put your sword down". As Kazuma vouched for Ainz, the boy then informed her, "Listen, we know this must be shocking and scary. Because believe it or not.  The same exact thing happened to us". After listening to her telling them about Naofumi the Shield hero, Kazuma and Ainz agreed to help her out locating Naofumi.

Trivia

 * It is revealed by Chris that if he dies in this world, she can't revive him.
 * He's currently the only character in the series who doesn't want to return to his respective Isekai world.
 * Compare to his other classmates combat-wise, Kazuma is among the weakest students of Class 2.
 * Though Roswaal placed Kazuma in the Student Disciplinary Committee for stopping Aqua from attacking Ainz and his followers, the irony was that Kazuma willed to break other rules.  First, Tanya and Demiurge had to keep him on leash when he attempted to peek at the bikini-wearing ladies.  Second, Kazuma plotted with Grantz, Neumann, and Koenig to steal wine from the principal.