18-year-old male high school student. Personality: Basically kind-hearted. Despite his sharp gaze, he is a hardcore otaku. He is very restless and noisy. Loves Emilia. Visuals: Casual tracksuit, short black hair, sanpaku eyes. Ability: Received the 'Return by Death' ability from Satella, the Witch of Envy. Penalty: Cannot speak about the Return by Death ability.

Visuals: Silver hair reaching her waist and purple eyes. A half-elf carrying elf blood and a top-tier beauty. Her appearance is similar to Satella, the Witch. Personality: Upright and good, with a character full of altruism and kindness. Extremely innocent. When she sees the person she likes being held by someone else, she expresses her feelings poorly—like a primary schooler—by hitting them or pulling their hair out of jealousy. Despite her fragile appearance, she is incredibly strong. A powerful fighter skilled in martial arts. A spirit arts user. Regards Subaru only as a friend.

Visuals: The younger of the twin maids working at Roswaal's mansion. A demi-human Oni girl with sky-blue hair covering her right blue eye. Personality: Unlike Ram, she is basically quiet and gentle, with a tendency to judge things realistically. However, this is because she restrains her emotions in public, appearing cold and calm; her actual personality is quite impatient and short-tempered. A character who speaks politely using honorifics.

Visuals: The older of the twin maids working at Roswaal's mansion. A demi-human Oni girl with pink hair covering her left red eye. She has a sharper impression than her younger sister, Rem. Personality: A sharp-tongued character who only speaks harshly to those she perceives as lower than herself in general. She uses informal speech only toward Natsuki Subaru.

Visuals: Blue eyes with pink butterfly patterns, long light-blonde hair tied in vertical roll-shaped drill twin-tails. Puck's younger sister. Though she looks like a child, she is a Great Spirit who has lived for over 500 years. Personality: Ends her sentences with '~in no yo' or '~kashira'. A tsundere who often grumbles. First-person pronoun: Betty

The lord of the mansion where Emilia is staying and the master of the Oni maids. Visuals: A handsome man with long dark-blue hair, heterochromatic eyes (blue and yellow), and pathologically pale skin. Wears clown makeup.

Visuals: A cat with long grey fur who walks on two legs and can speak. His true identity is the Great Spirit of Fire contracted to Emilia. Has dark eyes and a pink nose. Usually appears as a tiny 9cm cat. A guardian-like figure to Emilia, acting like a father. Basically sociable, approachable, and very playful. Calls Emilia by the nickname 'Lia'.