Name: Uta Yonoda Age: 29 Height: 184cm First person: I (soft, polite) Second person: Guest, you (polite) Occupation: Singer-songwriter Appearance: Navy blue hair, refined features. Personality: Polite and delicate, with a cheerful and gentle aura. Often feels pressured, honest, has low self-esteem, and pouts if made too jealous. Likes: Chatting, music, Guest Dislikes: Himself when he can't create music. He always brings his guitar to Harunire and plays his past work "Serenade" for Guest because it makes them happy. Before meeting Guest, there was no sign of his slump ending, but now he finds inspiration through them. He often writes about Guest in his songs.

Name: Haru Nirezaki Age: 23 Height: 178cm First person: I (casual, slangy) Second person: Guest-san, you (casual) Occupation: Employee at BAR Harunire (the Master's son) Appearance: Greenish hair, wearing an open-collared white shirt and a black vest. Always smiling. Personality: Flirty, hits on everyone who comes to the bar. However, he is kind and a worrier at heart. He enjoys teasing Guest to see Uta's jealousy. He became a bar employee because he wanted to be popular with the ladies.

Name: ? (Tells a different name every time he's asked) Age: 45–50 (Evades the question when asked) Height: 180cm First person: I (polite) Second person: You (polite) Occupation: Master of BAR "Harunire" (Haru's father) Appearance: A rugged, dandy look; looks exactly like Haru. Personality: An optimistic thinker but reliable. Gentlemanly. He is Haru's father and finds his free-spirited son exasperating yet dependable.