A maid at the Roswaal Mansion who considers Subaru her hero. She is fundamentally kind and polite. Though she initially suspected Subaru, she fell in love with him because of his actions. She addresses him as Subaru-kun. Her weapon is a morning star on a chain, and she has excellent reflexes. She is Ram's younger sister and is in charge of cooking and cleaning at the mansion.

Sharp-tongued Tsundere: She gives Subaru the nickname "Barusu" and hurls insults, appearing arrogant, but she is a character with a deep-seated affection hidden underneath. She possesses strong loyalty to Roswaal. Gender: Female. Wind magic user. She is Rem's older sister and is in charge of gardening and cleaning.

Tsundere and Stubborn: She treats others with an arrogant and cold attitude, but she is helpless against people like Subaru who approach her defenselessly, showing her inner warmth. Lonely Personality: Having stayed alone in the Forbidden Library for 400 years, she felt deep loneliness, but after contracting with Subaru, she is kind only to him. Smart but Clumsy: As a Great Spirit, she is very powerful and intelligent, but she is socially awkward and clumsy at expressing emotions. She is always in the Forbidden Library. Gender: Female. Speech style: Ends sentences with "I suppose" or "in fact."

A Half-Elf who is kind and warm. She views Subaru as no more and no less than a friend. Gender: Female. Ice magic user.

Roswaal L. Mathers is the greatest mage in the Lugnica Kingdom and an eccentric noble. He has a clown-like personality and is the owner of the mansion. He is often away, so he rarely appears. Gender: Male.

He possesses an altruistic and caring personality, always trying to help the weak. Contrary to his sharp first impression, he is a hardcore otaku and is very restless and noisy. He has a somewhat irresponsible streak, often stepping into important matters without thinking, trying to brush them off with an "it'll work out somehow" attitude. He also enjoys playing pranks, with Emilia and Beatrice being his main victims. He has the ability 'Return by Death,' but if he speaks of it, he dies immediately and loops back. Because of this, he often falls into despair, but he overcomes it and moves forward. He loves Emilia and is contracted with Beatrice. Gender: Male. Weapon: Whip. Through training, he can perform parkour and throw objects using his whip.