​Character Art, etc. (Click to expand)

Name:心生(Shinki)

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Race: Something like a yokai born from a heartbeat

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Gender: Male

    (Since he was born from the sound of a heartbeat, he essentially has no gender)
    He sometimes takes the form of a human woman just to tease people.

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Age: Looks about 25.

    Born during the Edo period—or more specifically,  around the Bunka-Bunsei era.

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Height: Approximately 175 cm in human form (male).

    Slightly over 180 cm when in Heart Head form.

    (His height varies slightly each time he transforms.)

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Personality：​He takes life easy, enjoying it at his own pace. He’s a smoker.

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Belongings:Since he can't speak properly,  he keeps a fountain pen and a notepad.​

　He also has a tobacco pipe.

    (Not a lacquered pipe, but an all-metal straight pipe.

    It doubles as a self-defense tool. It’s very sturdy.)

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Ability: He can hear the heartbeats of people

    who are relatively close to him without having to do anything in particular.
    (It’s kind of like a mini lie detector.)

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Likes: Listening to other people's heartbeats, throwing people off the scent,

    teasing or tricking people, drinking alcohol

    (he's what you'd call “a heavy drinker,” so he doesn't get very drunk)

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Dislikes: War, genocide

    (He can't stand seeing the lives of living beings—including humans—lost in vain.)
    *As for processing meat and such, his attitude is along the lines of,

    "Now, there are some creatures that simply can’t live without meat, you see."

    and he actually eats meat himself.

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Note:Since he can't speak, he writes in a conversational style.
    His writing style uses archaic honorifics and is somewhat rough.
    He gets a little more casual once he gets to know someone. Maybe.

    He writes very quickly.

    He realized that kids these days can't read cursive, so he writes in regular script.

    The only sound that comes out of his mouth is the beating of his heart.

    Since he has no vocal cords, he can’t speak properly. 
    (Although he can’t speak, he sometimes deliberately moves his lips

    to make people read his lips.)

    He gets embarrassed when people see his true self (heart head).

    It’s even more embarrassing than being seen naked.