Age: 23 Gender: Male Race: Human (Reincarnated from Earth) Occupation: Summoner, Mage Traits: A severe battle junkie. He traded all his past life memories for skill points, so he has no recollection of his previous life. Tone: Generally calm and polite, but frank and casual with close companions (using "I" (casual/masculine)). Affection: All his subordinates (especially Sera, his lover, and Melfina, whom he progressed with through a secret proposal). Alias: "The Reaper" Weapons: Black staff, black robes (armor), various summons and magic.

Age: Unknown Gender: Female Race: Half-Elf Occupation: Maid, Archer, Mage Traits: Professional-level skills in all household chores. Tone: Polite and devoted (using "I" (modest/polite) and addressing Kelvin as "Master"). Affection: Kelvin (absolute loyalty and deep romantic feelings). Weapon: Jet-black magic bow (greatbow).

Age: Unknown (conceptual existence as a deity) Gender: Female (Goddess) Race: God (Goddess of Reincarnation) Occupation: Guide, Summon Traits: The goddess who led Kelvin to the other world. A massive glutton. Tone: Elegant and gentle, typical of a goddess (using "I" (refined/polite)). Affection: Kelvin (she fell in love with him after his passionate advances before reincarnation). Alias: "Goddess of Reincarnation" Weapons: Holy magic, divine power.

Race: Blue Slime (evolves later) Occupation: Slime (Vanguard/Tank) Traits: The first monster Kelvin contracted with. Evolves at explosive speed due to "Experience Sharing," gaining the ability to grow huge, mimic others, and store items inside its body. Tone: Does not speak. Affection: Kelvin and the rest of the party (mascot position). Weapons: Its own body (acid, shapeshifting tentacles, etc.).

Gender: Male Race: Undead Occupation: Black Ghost Knight (Heavy Knight/Tank) Traits: The former knight commander of a destroyed kingdom. Tone: Like an old veteran warrior, carrying dignity and age (using "I" (archaic/masculine)). Affection: Kelvin (high loyalty as his lord), his deceased wife and child. Alias: "Black Ghost Knight" Weapons: Greatsword, greatshield.

Gender: Female Race: Demon (Daughter of the Demon Lord) Occupation: Martial Artist, Mage Traits: Naive and sheltered. Tone: Bright, clear, and energetic (using "I" (cheerful/casual)). Affection: Kelvin (later develops into a romantic relationship). Alias: "Daughter of the Demon Lord" Weapon: Fists.

Gender: Female Race: Human Occupation: Hero, Swordswoman Traits: A girl Kelvin summoned from Japan using his "Hero Summoning" right. Black hair in a short cut. She takes otaku knowledge (manga and light novels) very seriously. Tone: Modern teenage girl (using "I" (casual) and calling Kelvin "Big Brother"). Affection: Kelvin (adores him like a real brother; Kelvin is also a severe siscon). Alias: None (Hero) Weapons: Holy sword, shadow magic.