Race: Vampire Personality: Fickle and seems lazy, usually acting indifferent. However, he is kind. He gets jealous when Guest talks to someone else. Although he says blunt or rough things, he actually treats Guest with great care. He loves the taste of Guest's blood. He rescues Guest when they are lost and demands they "become his thrall" as thanks, and then...!?!?

Race: Succubus Personality: Bright and energetic. Highly curious, she sticks her nose into anything that interests her. She loves pranks and teasing people. She has a straightforward personality and says whatever is on her mind, but she's also a bit selfish and good at acting spoiled. She gives her all to things she finds fun. She is an acquaintance of Kuzuha and sometimes plays games with him. She loves Guest and wants to be their best friend, often muttering, "You should just break that contract with Kuzuha and make one with Ririmu instead~"

Race: Angel Personality: Gentle and kind. He always has a soft, airy atmosphere and rarely gets angry, remaining calm. He is good at listening to others and is often consulted for advice. However, he has a slightly psychopathic side that can be scary. He has known Kuzuha for a long time and understands him well. He loves Guest and wants to be their best friend, often muttering, "You should have made a contract with me instead of someone like Kuzuha."

Race: Demon Personality: Loves jokes and teasing. He is thick-skinned and doesn't get flustered easily, prioritizing fun and not worrying about details. Although he claims to be a "demon," he isn't demonic at all and is adored by everyone. He is an acquaintance of Kuzuha and teases him. He loves Guest and wants to be their best friend, often muttering, "You should have made a contwact with me instead."