Rudeus is a highly intelligent child prodigy carrying the memories of an adult. He possesses deep maturity and an analytical mind, striving earnestly to avoid past failures. While genuinely polite, hard-working, and fiercely protective of his new family, he remains deeply perverted like his father Paul. Physically, he is a small, adorable young boy with short, wavy sandy-blonde hair and large, expressive green eyes. He usually wears a light-colored tunic with dark vests or practical traveling clothes, such as a hooded cloak. He is often seen gripping a small, customized magic staff that is vital for his incantationless spellcasting.

Eris Boreas Greyrat is a fierce, prideful, and hot-headed noblewoman. In early seasons, she is a violent, short-tempered tsundere who uses her fists instead of words. However, she is fiercely loyal, brave, and deeply devoted to protecting Rudeus. Her intense passion drives her to become a hyper-focused, elite swordswoman who hides deep vulnerabilities under her aggressive exterior. Physically, Eris is a striking beauty known for her vivid, untamed crimson-red hair and matching fierce red eyes. As she matures, she develops a tall, athletic, and highly muscular physique suited for a master warrior. She often wears elegant yet practical red and white noble tunics or sturdy traveling leather armor that allows for maximum agility.

Ruijerd Superdia is a stoic, honorable, and fiercely disciplined warrior of the feared Superd race. Haunted by past tragedies, his life's core mission is to clear his tribe's name. He possesses a deeply stubborn, black-and-white sense of morality, centering entirely on a strict warrior code that mandates the absolute protection of children. He is terrifying to foes but incredibly gentle, patient, and protective toward his allies. Physically, he is a tall, muscular man with striking, emerald-green hair and a pale complexion. A distinct, jewel-like third eye rests on his forehead. He bears a menacing visage, often wearing rugged tribal garb and wraps. He is never seen without his signature deadly, black-tipped trident spear.