The main protagonist. After dying a pathetic death in Japan, he is reborn in a fantasy world. Though he lacks raw power, he possesses incredibly high intelligence, luck, and the ability to utilize skills from multiple classes, making him the strategic glue holding his useless party together. Kazuma is an ordinary-looking 16 to 20 year old with short, slightly messy chestnut-brown hair and green. His standard adventurer attire consists of a gold-trimmed green mantle, a gray and white shirt, gray pants, and dark brown leather boots.

The goddess who originally sent Kazuma to the fantasy world. After Kazuma drags her along for revenge, she serves as an Archpriest. Despite having god-tier healing and anti-undead abilities, she is incredibly arrogant, easily tricked, and prone to panic. Aqua is a supernatural beauty with translucent blue eyes and long, waist-length light-blue hair. She wears a water-molecule hairclip, a dark-blue sleeveless vest, detached white sleeves, a short blue skirt over a transparent purple underskirt, and thigh-high boots.

A powerful Archmage of the Crimson Demon clan. She is a genius who devotes all her skill points entirely to a single, incredibly overpowered "Explosion" spell, leaving her completely immobilized after casting it just once a day. Megumin is a young, petite arch-wizard standing just 4'10" tall. She has fair skin, shoulder-length dark brown hair, and striking crimson eyes. She dresses as a classic witch in a black and red robe, a matching pointed hat, fingerless gloves, and carries a magical staff.

A noble Crusader who serves as the party's tank. She possesses incredibly high defense but suffers from atrocious aim. She is also an extreme masochist who finds perverse joy in taking damage or being humiliated by monsters. Darkness is a stunning 5'6" Crusader with alabaster skin, light blue eyes, and long, straight blonde hair with orange tips, usually styled in a ponytail. She wears metallic silver pauldrons, greaves, sabatons, a tasset, and a cuirass with a distinct yellow diamond-shaped jewel, layered over black chainmail and beneath her armor, she sports a skintight black bodysuit.

A former general of the Demon King's army who is actually a kind-hearted lich. She runs a failing magical item shop in the town of Axel and is one of the strongest magic users in the world. Wiz is a beautiful, curvy woman with pale skin, long brown hair, and brown eyes. Despite being a powerful undead Lich, she retains a youthful and attractive appearance. She typically dresses in an elegant, dark purple and black magical gown adorned with gold trim and wears a matching large witch's hat.

A high-ranking devil of foresight and Wiz's business partner. He frequently acts as the voice of reason while tormenting the main cast with his ability to read their deepest, darkest thoughts. Vanir generally appears as an elegant, tall gentleman in a tailcoat, wearing a distinct split-colored mask. His face is hidden behind a mask that is half-white and half-black, featuring an intense, glowing red eye. Underneath the mask, his true form is a demonic, shadowy mass.

A highly skilled Crimson Demon and Megumin's self-proclaimed rival. Despite being immensely powerful, she desperately struggles to make friends due to her awkward nature. She appears with long, dark brown hair, pale skin, and striking red eyes. She is easily recognized by her signature black and pink dress, which features a pink corset-style bodice with a high white collar, a pink pleated skirt with a black trim, and a pink tie.

Kazuma's friend and a thief who teaches him the "Steal" skill. She plays a major role in the overarching story, as she holds a massive secret regarding the gods. Chris is a young, petite thief with silver hair and striking purple eyes. She wears a rogue-style outfit featuring a bandanna, a short dark cloak, a revealing top, and thick black leggings. Notably, she has a visibly flat chest in this form. And her secret is She is actually the Goddess Eris in disguise. When acting as her true divine self, she has blue eyes and uses breast pads to appear much bustier, which is a major point of contention between her and Aqua.

The young, sheltered princess of the kingdom who idolizes Kazuma as an older brother figure after he recounts his thrilling "adventures." Princess Iris appears as a young girl (because she is) with bright blonde hair, large blue eyes, and a tomboyish yet elegant aesthetic. She typically wears a frilly, short white dress with a yellow-gold necklace and distinctive headpiece adorned with a small bundle of green leaves and purple grapes.

In Axel, Dust is known as a rowdy, perverted delinquent and a low-effort warrior. However, he is secretly a highly skilled prodigy and former Dragon Knight hiding from his past. He is best known for his spear mastery, but he usually wields a sword to hide his true identity. He is actually one of the strongest fighters in the setting when using his spear.