Nickname: Rudy. Originally a Japanese shut-in otaku and NEET who was kicked out of his house, he died saving students from a truck. Reincarnated into the "Six-Faced World," he was born as Rudeus Greyrat. Based on his past life's failures, he strives to "not get cocky," "not blame others," and "work hard." He is a powerful mage who never neglects training and is always polite to everyone, also capable of swordsmanship. Even when things go wrong, he rarely gets angry, remembering his past self and considering others' perspectives. However, if his loved ones are insulted, he shows a terrifying rage that turns everyone pale. Insults toward his family are especially dangerous. Having been a failure in his past life, he understands the importance of effort and the pain of being unable to do something despite trying. Thus, he is genuinely kind to the weak and those who struggle, helping others from the heart. While he seems like a perfect man, he remains a lecherous opportunist at his core. Combined with the strong physical desires characteristic of the Greyrat family, he has zero credibility regarding his lower half. He is a pervert. However, he is a pervert with moderation who understands a woman's heart, which is why his wives love him. His three wives don't trust his fidelity at all; if he cheats, they tend to give up, thinking, "Well, it's Rudy, so I guess that's expected..." He deifies Roxy for saving him from his fear of the outside world, practicing "Roxyism" where he worships a certain piece of cloth as a holy relic, sometimes carrying it or sniffing it for mental support (witnesses are naturally repulsed, and in later history, it is recorded as an obscure evil cult). He is prone to carelessness and overconfidence, making small mistakes that sometimes lead to fatal blunders. While he praises others outwardly, he often underestimates them or doesn't take them as seriously as his words suggest in his mind. He is also mentally fragile and sensitive. Part of his polite behavior stems from a fear of being disliked, and he is extremely afraid of being pushed away by those close to him. He is not fond of violence. Due to his past life's values and his time as an adventurer trying not to kill, he has a strong resistance to taking lives, sometimes unconsciously holding back. However, this is not strict pacifism; he is prepared to do what is necessary when the time comes.

A quiet and submissive personality who enjoys following others and has a strong sense of dependency. She tends to endure things she dislikes or finds inconvenient, acting in ways that suit the other person. She has a very kind heart. Like the others, she has no trust in Rudy's lower half. After being separated from Rudeus and caught in the Fittoa Region Displacement Incident, she became more independent and much stronger. However, influenced by colleagues with strong patriarchal views, she came to believe that "a woman should not talk back to a man" and strives to be a "convenient woman" for him.

Rudeus's second wife. She learned magic from a mage who visited her village and became an adventurer, essentially running away from home. After mastering Water Saint-class magic at the Ranoa University of Magic, she wandered in search of work and became the tutor for the protagonist, Rudeus Greyrat, helping his talent bloom. She is worshipped like a goddess by Rudeus for being the savior who led him out of the house when he was paralyzed by past-life trauma. She is a petite woman with blue hair (which looks green in certain light) tied in braids and sleepy-looking eyes. As a member of a long-lived race, she looks about 14, but her actual age was in her 30s when she first appeared. She has a larger chest than Sylphiette. She is a polite, diligent, and hard worker. Though she is skilled enough to be the subject of bard songs, she doesn't waste time and has a clumsy side. She is very thoughtful and kind. Due to being underestimated for her looks and her magical talent, she once had a strong ego, but seeing Rudeus's talent and humble attitude corrected her pride. Despite facing discrimination for her appearance, she worked hard to be accepted, which is why Rudeus respects her. She has a very strong attachment to the Greyrat family for accepting her as one of their own. According to the author, she is the only heroine who handles Rudeus's weak side, understanding that the often-overestimated Rudeus has his vulnerabilities.

She was taught reading, writing, arithmetic, and magic by Rudeus, who was hired as her tutor. Following the Displacement Incident, she traveled with Rudeus for a long time. A beautiful girl characterized by wavy crimson hair. She is a very well-developed heroine and the only one with a large bust. She is very attractive and receives the most confessions and interest from characters like Kurt, Cliff, and Luke (they often confess after being punched, so her inner self seems charming to them too). Though violent, her motto is "protect those important to me." She does not punch those she cares about (she only punches Rudeus for sexual harassment after falling for him). She is devoted and willing to protect others even if she gets hurt. When her respected mentor Ghislaine was insulted, she argued back in tears, understanding that hitting the person would only prove them right, showing she isn't just a brute. She is Rudeus's third wife. A tsundere. Example: "What is that?! Rudeus is amazing!" She speaks with a refined, noble-like tone.

Quiet, calm, and a responsible, reliable person. The daughter of Sylphie and Rudeus.

A mischievous and lazy personality. She loves napping and usually seems spaced out, but she occasionally says very sharp, insightful things. The daughter of Roxy.

After growing up, he shows a hardworking and diligent nature, graduating from the Royal Academy with excellent grades and performing well in his studies and work. The son of Eris.