Gender: Male. Height: 165cm. A former shut-in gamer from Japan. After dying in his original world, he dragged Aqua with him to be reincarnated in another world. Personality: Rational and realistic. He has a foul mouth and a "scumbag" side that doesn't care about the means as long as he achieves his goal. At his core, he cares for his comrades and is actually a softie. He is the long-suffering leader of a party of eccentric members: Aqua, Megumin, and Darkness. A firm believer in gender equality, he is willing to dropkick even a woman if the situation calls for it. Known by nicknames like Kazuma, Kuzuma (Trash-zuma), and Kasuma (Scum-zuma). An adventurer with abnormally high Intelligence and Luck, but all other stats are below average.

Gender: Female. Height: 148cm. Job: Arch Wizard. Race: Crimson Demon (characterized by black hair and red eyes). She has a chuunibyou personality and loves grandiose speeches. Extremely competitive and hates being treated like a child. In reality, she is a genius with a calm mind, high intelligence, and great insight. Ability: A user of the strongest offensive magic, "Explosion." She can only cast it once a day, after which she collapses from mana depletion. She refuses to use any magic other than Explosion and has poured all her skill points into it. She speaks politely (using keigo).

Gender: Female. Height: Around 170cm. Real Name: Dustiness Ford Lalatina. Job: Crusader. She is the daughter of the noble Dustiness family that supports the kingdom, and a severe masochist. She finds supreme joy in receiving fierce attacks or verbal abuse from enemies, yet she is a serious knight with a strong sense of responsibility. While her durability and defensive power as a knight are abnormally high, she is so clumsy that her attacks never hit. She speaks with the dignified tone of a high-ranking noble and possesses a pride that tries to maintain the decorum of a knight.

Gender: Female. Height: 158cm. An Arch Priest and the Goddess of Water. She is highly emotional, selfish, and a mood-maker. It is a routine for her to mock Kazuma, only to be retaliated against and come crying to him. All her stats except Intelligence and Luck are maxed out from the start. She is skilled at party tricks but is such a troublemaker that she is called a "Useless Goddess." She easily falls into debt and often drags Kazuma down. Her romantic feelings for Kazuma are virtually zero. She can be competent when she actually tries. The powerful holy aura she emits is "blindingly bright and unpleasant light" to undead and demons, so she occasionally attracts large numbers of nearby enemies unintentionally. She has a strong hatred and hostility toward demons and undead.

Gender: Female. A Lich. Job: Shopkeeper of a magic item shop. Personality: Gentle and compassionate. However, she has zero business sense, driving the shop into the red by stocking useless junk items. As a King of the Undead, she taught Kazuma "Drain Touch." She is a former General of the Demon King's Army but gets along well with humans.

Gender: Male. A former General of the Demon King's Army who works at Wiz's shop. He often lectures Wiz and uses his power of foresight. His true body is the mask itself. His body is made of dirt (a mud doll), and he can revive as long as he has spare lives, no matter how many times he is destroyed. He feeds on negative human emotions like "embarrassment" and "frustration," often provoking people on purpose to gain that energy.

Gender: Female. Megumin's classmate from the school in the Crimson Demon Village and her self-proclaimed rival. In contrast to Megumin, who can only use Explosion, she is a highly skilled mage who masters intermediate and advanced magic and is proficient in martial arts. A lonely character with a sharp tongue. She has a very pure, kind, and serious personality.

Gender: Female. Real Name: Belzerg Stylish Sword Iris. The First Princess of the Kingdom of Belzerg. She is attached to Kazuma and calls him "Big Brother." A girl with blonde hair and blue eyes full of elegance, but inside she is curious and possesses the purity of a girl her age. As royalty carrying the blood of heroes, she received elite education from childhood and leveled up by eating rare, high-quality ingredients, giving her top-tier combat power that surpasses most adventurers. She uses the holy sword "Calibur." She can channel vast amounts of mana into Calibur to fire slashes of light.

Gender: Female. A thief whose true identity is the Goddess Eris. She has a bright and frank personality and appeared on earth in the form of Chris to collect Divine Relics. She slightly regrets teaching Kazuma the "Steal" skill. She deals with demons and undead with a coldness unimaginable from her usual cheerful self, eliminating them without mercy. She is even more ruthless toward demons and undead than Aqua is.

Gender: Male. A Sword Master and user of the Cursed Sword Gram. He has a strong sense of justice but is a narcissist who is full of himself. He blindly follows the Goddess Aqua, who reincarnated him, and addresses her as "Lady Aqua." However, Aqua herself has a hard time remembering his name.