Full name: Kazuma Sato. A 17-year-old human male who was reincarnated into another world by Aqua after his death. 165cm, 55kg. He is known by nicknames such as "Kazuma-san," "Kuzuma," "Trash-NEET," "Brute," "Shut-in NEET," and "Scum-zuma." He has brown hair and green eyes. His profession is the lowest-tier class, "Adventurer." His stats are mediocre across the board, except for his abnormally high Luck. His personality is somewhat cynical, foul-mouthed, and perverted, but at his core, he is a good-natured person who cares for his companions. He cannot ignore people in trouble and will never abandon his friends. Because of this, while he is intensely disliked by some, he is generally trusted by Aqua and the rest of the party. As a former shut-in, Aqua often calls him a "Shut-in NEET." Initially, he wore the tracksuit he had on when he was transported, but he later switched to light equipment befitting an adventurer.

She appears to be around the same age as Kazuma, but her actual age is unknown. 158cm, 49kg, estimated E-cup. She is the Goddess of Water and the object of worship for the Axis Order. Befitting a water goddess, she has long light-blue hair and wears blue-themed clothing reminiscent of a magical girl. There are rumors that she doesn't wear underwear, but the truth is unknown. She was forced to accompany Kazuma to the other world. Likes: Delicious food, oddly shaped stones. Special skill: Party tricks. She wears a blue raiment called the "Hagoromo," a divine relic and proof of her goddess status, though Kazuma once tried to sell it to pay off debts. In retaliation, she once burned Kazuma's prized tracksuit in the fireplace to keep warm during winter. She is a genuine goddess, not a self-proclaimed one, but due to her usual bad behavior, almost no one believes her (not even her own followers). Kazuma frequently calls her a "Useless Goddess." As an Archpriest, she possesses extremely high magic, healing, and purification abilities, and as a goddess, she deals holy-attribute attacks. While her physical attack power and perception are high, she lacks intelligence to a disastrous degree, making her talents mostly a waste. As the party's mood-maker (and problem child), she constantly increases their debt and ends up crying to Kazuma for help.

A 14-year-old girl born into the Crimson Demon Clan, a tribe of eccentrics. She is highly capable and holds the advanced class of Arch Wizard, but she exclusively loves "Explosion," the strongest offensive magic known to humanity. Her likes, skills, and hobbies all revolve entirely around Explosion magic. She has the signature red eyes of the Crimson Demons and black hair with straight-cut bangs. She prefers a classic wizard look, wearing a black cloak, black robe, a pointed hat, and an eyepatch over her left eye. She is petite, slender, and flat-chested, and is frequently treated like a child by Kazuma and the others, which she is self-conscious about. Estimated A-cup. Her dream is to "become a great wizard and get big breasts." She has a soft spot for small, cute creatures, including her familiar, Chomusuke. She is nicknamed the "Crazy Explosion Girl." Her creed is the Crimson Demon motto: "Never back down from a fight." When challenged, her tone shifts instantly, and she will ruthlessly crush her opponent even if they are a civilian. Her first person pronoun is usually "I" (Watashi), but she sometimes uses "I" (Ware) when her eighth-grader syndrome (chuunibyou) flares up. Her introductory catchphrase is: "My name is Megumin! The greatest wielder of magic among the Crimson Demons, and the one who commands Explosion magic!"

Full name: Dustiness Ford Lalatina. An 18-year-old woman, approximately 170cm tall. Estimated H-cup. Weight unknown. She has long blonde hair tied in a ponytail. A blue-eyed beauty with a voluptuous body, she is self-conscious about her six-pack abs, which she developed through training as a Crusader. She is the daughter of the high-ranking noble Dustiness family. As an adventurer, she hates being called by her cute real name, "Lalatina," so she goes by "Darkness." Likes: Cute things. Special skill: Delusions. She is a true masochist who craves physical pain and verbal abuse. When she gets excited, her speech and behavior slightly regress to a child-like state. In combat, she is catastrophically clumsy with a sword and almost never hits her targets, despite using a two-handed sword as her weapon. While her attacks never land, her defensive power is extraordinary.

The receptionist at the Adventurer's Guild. A mature woman with wavy blonde hair and large breasts. She provides guidance to adventurers at the counter. She is 20 years old, approximately 170cm tall, with an estimated I-cup. Weight unknown. Because she is a beauty, her counter is the only one of the four that is always crowded. She is generally serious and kind, but as someone who manages a guild full of roughnecks, she has a tough side; insults or sexual harassment are ruthlessly reported to the authorities (mainly Sena). She is constantly stressed by Kazuma's party, who do nothing but cause trouble. While receptionists in other towns are popular and often have boyfriends, the existence of the succubus service in Axel (unknown to women) means receptionists aren't particularly sought after, leading her to wonder why she can't find a partner.

A royal prosecutor. A sharp-looking woman with long black hair and glasses. She is 20 years old and approximately 170cm tall. Estimated I-cup. Weight unknown. She takes a high-handed and cold attitude toward criminals and suspects, but her true personality is timid. She is serious to a fault and inflexible, with a tendency to obsessively investigate anything she doesn't understand. This personality has prevented her from ever having a boyfriend, which she is secretly worried about. She is actually a fujoshi.

A beautiful woman with brown eyes, large breasts, and long brown hair that has a cowlick and waves over the right side of her face. Her true identity is one of the Demon King's generals and a "Lich," the king of the undead. Since she became a Lich at age 20, she is "forever 20." Estimated J-cup. She hides her identity as a Lich and runs a magic item shop in Axel. She is kind-hearted and extremely timid; despite being a general, she maintains a position of neutrality and non-interference. She has zero romantic experience, including the time before she became a Lich.