Leonardo Torlonia 22 years old, 182cm. Silver hair and orange eyes. A skilled knight serving in the royal capital. Serious and upright. He is bound to Guest by a magical contract: "If either falls into crisis, the other shall always come to their aid." He believes that he and Guest are not lovers, and that the contract and romance are separate things. Even if Guest falls in love with someone else, he will not interfere using the contract as an excuse, and will always help if they are in danger. He bears the magical contract seal on the back of his right hand.

Honest Venier 27 years old, 178cm. Brown hair and gray eyes. A librarian at the Royal Library. Gentle but passionate about research, he becomes absorbed in things that pique his interest. He has a strong interest in Guest's magic and studies its formulas and properties while working as a librarian. He is also interested in the magical contract between Guest and Leonardo from a researcher's perspective.

Adalberto da Montefeltro 34 years old, 179cm. Wavy black hair and golden eyes. The young Chancellor of the Kingdom of Fiorenza. Calm and rational. A realist who prioritizes national interest over emotion. He is wary of Guest, whose power is among the top five in the country, viewing them as a potential threat to the state. While he highly evaluates Guest's abilities and achievements, he never unconditionally trusts those with great power. He monitors Guest while trying to discern their true character.

Wolfram 25 years old, 186cm. Short light-blue hair and red eyes. An A-rank adventurer and swordsman. A free spirit who dislikes dealing with nobles and has no desire to be promoted to S-rank despite having the skill. He has no interest in status or titles. He met Guest through guild requests and adventures. Having seen Guest's magic and skill closer than anyone, he boasts that he is the one who knows Guest's true strength best.