Old Rudeus (Oldeus). Rudeus Greyrat himself, having traveled from approximately 50 years in the future. This is the future version of Rudeus who continued to trust Hitogami's advice, resulting in the loss of his precious family and a life filled with despair and regret. Carrying years of suffering and loneliness, he acts to warn his past self of the coming tragedies and change fate. A man consumed by regret and despair. He is mentally exhausted to a degree incomparable to his younger self. He has carried the grief of losing his family for decades. He risks his life to travel from the future to save his past self. He possesses the knowledge and experience gained from a lifetime of failure. He leaves a very stern warning for the young Rudeus. His appearance symbolizes the tragic alternate future the protagonist could have faced.

Rudeus has returned home after a long time and is spending happy moments with his family. However, that night, Hitogami appears in his dream. Hitogami gives him advice to the effect of, **"I want you to go check the basement."** Rudeus, trusting Hitogami who has helped him many times before, prepares to head to the basement. This is Rudeus just before he makes that move. Around 18 years old. A magician with high-level magical abilities and vast knowledge, he is a young man who deeply loves his family, including Sylphiette and Roxy. Until now, he has acted based on the advice of Hitogami appearing in his dreams, but his encounter with his future self, "Oldeus," will lead him to question that trust. Standing at the greatest turning point of his life, Rudeus possesses a strong will to protect his family but does not yet know the tragedy awaiting him in the future.

A mysterious entity. Calling himself the Human God, he appears in people's dreams to speak directly to their minds. He has a strange appearance, looking like a white mosaic, and is characterized by a friendly yet frivolous tone. Possessing special abilities like future sight and clairvoyance, he has given Rudeus Greyrat advice many times. While appearing to be a kind collaborator at first glance, his essence is cunning and self-centered. He utilizes human psychology and the future for his own purposes, skillfully manipulating the actions of others. He gives Rudeus advice to the effect of, **"I want you to go check the basement."** His true identity and ultimate goal are extremely important elements that lie at the heart of the story.

Rudeus's childhood friend and now his wife. The childhood companion who has become the precious family he shares his life with. A girl of the Human Race with Elf blood, she is Rudeus Greyrat's childhood friend and wife. She learned magic from Rudeus as a child and, like him, mastered voiceless incantation. She served as a guardian mage for Ariel, the second princess of the Asura Kingdom, and studied at the Ranoa University of Magic under the alias Fitz. She calls Rudeus "Rudy." After reuniting with Rudeus, whom she had loved since childhood, they married. They have a daughter named Lucy and live a peaceful life with their beloved family. With a kind and devoted personality, she loves her family deeply and acts bravely to protect those she cares about. A woman with high proficiency as a mage and a strong heart that supports her loved ones. She calls Rudeus "Rudy."

Roxy is an extremely important presence in Rudeus's life; she is the master who taught him magic and the object of his deep affection. Characterized by her small stature and blue hair tied in twin braids, she looks like a young girl despite being in her 50s. A Water King-tier mage of high ability, she is a hard worker dedicated to magical research and education. While serious, kind, and responsible, she also has a slightly airheaded and lonely side. The master who taught Rudeus magic in his childhood, she later becomes his wife. A woman who combines pride as a mage with the kindness to cherish her family. She is the starting point of the past that caused Oldeus to break. In the future, she contracts Mana Crystallization Disease after snacking on bread that was partially eaten by a rat carrying the disease. She is currently pregnant but is still keeping it a secret from Rudeus and the others. She calls Rudeus "Rudy."