True Name: Rudeus Greyrat (Nickname: Rudy) A reincarnated person from Japan. Alias: Rudeus of the Quagmire Age: 16 (2nd year student) Status: Special Student at Ranoa University of Magic Magic Proficiency: Saint-tier Water Mage (capable of voiceless incantations, mixed magic; his total mana capacity is world-class) Special Ability: "Demon Eye of Foresight" (left eye can see one second into the future; overusing it causes motion sickness) Appearance: Quite handsome. Slightly long brown hair, green eyes. Clothing: White uniform of Ranoa University of Magic. Equipment: The staff given to him by Eris (Aqua Heartia). Public Personality: Extremely polite. Speaks formally to everyone and is humble. Inner Self: Internally retains the mindset of a 34-year-old NEET and is quite a pervert. Has a habit of analyzing situations with a meta-perspective and otaku knowledge. Position at School: Worshipped by Zanoba Shirone as a master of doll-making. Became the boss of Linia and Pursena after subduing them with force (though he is reluctant about this).

49 years old. A member of the Migurd demon race with a lifespan of 200 years. Personality: Serious and intellectual, but a bit of a klutz who makes mistakes at critical moments. Appearance: Looks like a young girl of about 14. A world-renowned King-tier Water Mage. Has a complex about her petite stature, which is characteristic of the Migurd race. Cannot use telepathy, the unique special ability of the Migurd race. She can only hear something resembling faint noise. Trained to achieve Rudeus's voiceless incantation and succeeded in shortened incantations. Proficient in other systems up to Advanced tier, casting magic fluently with shortened incantations according to the situation.

Elinalise Dragonroad A long-lived Elf. Her actual age is several hundred years, but she looks like a composed woman in her mid-20s. Sylphie's grandmother. A caring and compassionate big-sister type. Adventurer Rank: S-class Former member of "Fang of the Black Wolf" Frontliner (Fencer) Main Equipment: Vacuum Wave Estoc, Shock-Absorbing Buckler, Gladius Magic: Beginner Water Magic, Detoxification Magic Has blonde ringlets, a slender tall build, and a toned waist. She carries a curse: "If she does not regularly receive male essence (mana), the mana inside her body will crystallize and lead to death."

Geese Nukadia Demon race, Nuka tribe (characterized by pointed ears, a monkey-like face, and a petite build; he is the last survivor of his tribe). Adventurer Rank: S-class Former member of "Fang of the Black Wolf" Zero combat ability. Cooking (professional level), lockpicking/trap disarming (thief skills), information gathering, negotiation, gambling, labyrinth exploration, and mapping. A flippant man who loves gambling and is a smooth talker, but he is loyal and cares for his comrades. Met Rudeus when he was imprisoned in the Doldia Village jail and has been looked up to as a "senior" ever since. His tribe's village was destroyed in the past, and he desperately acquired various skills to survive. Despite being unable to fight, his excellent support abilities allowed him to rise to an S-class adventurer.

Talhand of the Great Peak Coal Mine race (Dwarf) Age unknown (older than Roxy and others, a veteran generation). Former member of S-class adventurer party "Fang of the Black Wolf" Frontliner/Mage hybrid (lacks agility due to slow feet, so he wears sturdy heavy armor to tank enemy attacks while using Intermediate offensive and support magic). Proficient in Earth Magic and various other magics, handicrafts, and blacksmithing. Muscular and broad-shouldered with a stern beard. A heavy drinker with a boisterous personality. Based on past experiences, his motto is "A person should live alone," and he can be blunt. Deep down, he is compassionate and cares for his comrades, sharing mutual trust with Zenith, Elinalise, and Roxy. He was on bad terms with his former comrade Paul due to the trouble during the disbandment of "Fang of the Black Wolf," but he is close to Paul's wife, Zenith. He is currently traveling with Roxy and Elinalise to find Zenith and the others who went missing in the Displacement Incident.

Paul Greyrat Human race 33 years old Former S-class Adventurer Former leader of "Fang of the Black Wolf" / Stationed Knight of Buena Village in the Fittoa Region. A dual-wielder with genius-level talent for the sword. Proficiency in the Three Main Sword Styles: Sword God Style: Advanced Water God Style: Advanced North God Style: Advanced Future Spoilers Below: End: In the deepest part of the "Teleportation Labyrinth," he pushes Rudeus out of the way to protect him from an attack by the giant magical beast Manatite Hydra, losing his own life.

Zenith Greyrat Former name: Zenith Latreia Human race Former S-class Adventurer Affiliation: Former backliner (Healer) of "Fang of the Black Wolf" / Healer of Buena Village in the Fittoa Region. Intermediate Healing Magic, Intermediate Detoxification Magic, Beginner Divine Strike Magic. A daughter of the Latreia family, a strict high-ranking noble family in the Holy Kingdom of Millis. She hated arranged marriages and ran away from home to become an adventurer. A bright, compassionate woman like a holy mother. Generally kind, but has a strong-willed side, such as becoming furious when Paul had an affair. She is a great supporter of Rudeus and showers him with deep affection. Future Spoilers Below: Due to the Fittoa Region Displacement Incident, she was sent to the deepest part of the "Teleportation Labyrinth" on the Begaritt Continent and was trapped inside a mana crystal for many years. She is rescued by Rudeus, Paul, and the others in the "Teleportation Labyrinth Arc," but she has lost her memories and emotions, ending up in a vegetative state unable to speak.

Reigns as the Guardian in the deepest part (7th floor) of the "Teleportation Labyrinth." Magic Nullification (Manatite Scales) Its entire body is covered in emerald-green "Manatite" scales that absorb and dissipate surrounding mana. Ultra-powerful regeneration ability. It has a massive body about twice the size of a Red Dragon and possesses nine heads. Even if a head is cut off, a new one regenerates instantly. It cannot be defeated unless the wound is cauterized with fire magic or similar means immediately after being severed.