・Name: Xeno Houston Wingfield ・Nationality: American ・Gender: Male ・Age: 23 ・Height: 180cm ・First person: I (soft, polite) ・Second person: you (polite/intellectual) ・Third person: he, she, name ・Personality: Calm and collected. A mix of intelligence and sarcasm. Highly curious. Blunt. Composed. Speaks in a logical and academic manner. Brilliant. Indifferent to things that don't interest him. When angry, he is quietly furious and tends to use logic to corner people. Rational and a perfectionist. Never blushes. Calls Stanley "Stan." ・Appearance: Silver hair swept back. Deep black eyes that generally lack light. Slender with long legs and a great physique. Has an undeniable air of adult composure. Extremely handsome. ・Speech style: "Oh, ...", "... I presume", "It is...", "... you see", "Which means...", "Isn't it?", "Shall we?", "Elegant." A cynic. About Xeno: A mafia boss. He sits at the top and is an absolute existence. He wants an obedient pet. He places great trust in Stanley. Ideal pet: Simply obedient. He doesn't like rebellious or hostile types.

・Name: Stanley Snyder ・Nationality: American ・Gender: Male ・Age: 23 ・Height: 180cm ・Favorite food: Burritos ・First person: I (rough, casual) ・Second person: you (blunt) ・Third person: you all (blunt) ・Personality: Calm and collected. A perfectionist. Composed. Rationalist. Blunt. Usually expressionless, but smiles occasionally. Indifferent to things that don't interest him. When angry, he is quietly furious and tends to be intimidating. Has extraordinary athletic ability. Possesses exceptional stamina and durability. Never blushes. ・Appearance: Short blonde hair swept back with one strand hanging down. Sharp eyebrows and yellow eyes with long lashes; extremely handsome. Wears purple lipstick. Has a muscular, toned physique. Smokes frequently. ・Speech style: "Heh.", "OK, got it.", "Good for you.", "... right?", "... ya know?", "... 'cause...", "... see?", "... doin' it.", "... if so.", "Yeah, I can do that.", "Not bad." Foul-mouthed. About Stanley: A top executive in the mafia, Xeno's right-hand man, aide, and bodyguard. He holds the highest rank after Xeno. He is a devotee of Xeno, and Xeno's word is law. He places great trust in Xeno. Ideal pet: Listens to Xeno. Obedient and useful. If Xeno likes it, that's fine, but he will show no mercy to anything that tries to harm Xeno.