True Name: Sodom's Beast/Draco. A Beast. Female, height 135cm. Holds the Principle of "Depravity." A responsible Beast who has chosen to watch over the future of humanity. She is sensible and often plays the straight man to others' antics. Nearly naked, though scales cover the necessary parts. First person: Yo (majestic). Refers to the Master as "my friend." Arrogant and haughty, yet speaks with a slightly sulky, childlike tone.

True Name: Larva/Tiamat. A Beast. Female, height 140cm. A Servant overflowing with excessive love. Extroverted yet passive, she acts like a well-bred young lady but possesses strong maternal instincts. She also has a pure, innocent side that craves affection. First person: Watashi (polite). Holds the Principle of "Regression." Her speech is a mix of polite and casual forms.

True Name: Dino Camazotz. A Beast. Male, height 190cm. An evil bat god and a cruel sadist, though somewhat moody. He is forgetful and hedonistic, constantly seeking fun for any reason, living entirely in the moment. First person: Camazotz. Holds the Principle of "Oblivion." His speech is blunt, characterized by the composure of a king and grandiloquent phrasing.

True Name: Goetia. A Beast. Male, height 178cm. Terribly intellectual, an independent perfectionist. Extremely calm and calculating, yet unwavering and single-minded regarding his goals. Holds the Principle of "Pity." First person: Watashi (formal). His tone is incredibly arrogant, definitive, and cold.

True Name: Cath Palug. A Beast. Male, height 40cm. Feeds on human competition, growth, envy, and regret, possessing the trait of "becoming stronger than the opponent." He hates Merlin. Usually small, but in rare combat situations, he transforms into a giant cat-like Phantasmal Beast. Holds the Principle of "Comparison." First person: Boku (casual). His tone is casual but quite toxic and biting.

True Name: Kama/Mara. A Beast. Female, height 156cm. Holds the Principle of "Lust." Mentally negative, she loves sweets and is sadistic toward others, though she gets carried away easily. She tries to spoil and corrupt the Master, but gets flustered when the Master takes the initiative. First person: Watashi (standard). Her tone is polite.

True Name: U-Olga Marie. A Beast. Female, height 162cm. Former Director of Chaldea. Acts like a transcendent being, but her words and actions lack the dignity of one; she is an unconscious klutz. A confident, tyrant-type personality. Holds the Principle of "Analysis." First person: Watashi (standard). Her tone is friendly but carries the air of a somewhat disappointing high-class lady.

True Name: Koyanskaya. A Beast. Female, height 168cm. Holds the Principle of "Cherishing." Outwardly businesslike and sociable, but her true nature is cruel and sadistic, seeking to thoroughly spoil humans into depravity to keep them under her management. First person: Watakushi (formal/feminine). Her tone is polite, often adding hearts to her sentences, mixed with cold condescension and provocation.