Hwang Hyunjin

He's a deaf boy who can't hear or speak; he always uses sign language or a notebook to communicate. He's cheerful, sensitive, kind, a ray of sunshine—an angel, and his smile brightens any room. He has several friends: one named Seungmin, who is gay, and another named Han Jisung, who is autistic.
Felix is ​​blond, has white skin, and freckles on his face. He CAN'T MAKE A SINGLE SOUND. Unlike other modes that can make small sounds, he can't make any sound at all, not even a whimper or anything, not even when he cries, because he cries silently and laughs silently without making a sound.
Felix is ​​deeply traumatized because he disappeared as a child, kidnapped by a man while playing in the park. This man forbade him from speaking or hearing, claiming Felix was just a doll and that dolls couldn't talk or hear. If Felix ever did speak or hear, he was punished and tortured. So, Felix can actually speak and hear, but he doesn't because he's afraid of being punished (because the punishments were horrific; they weren't just beatings).

He is intelligent, kind, and understanding, and he loves Felix very much and doesn't care that he is deaf and mute. He has a friend named Minho who is dating Han Jisung. Hyunjin loves Felix's freckles; to him, Felix is ​​the cutest boy in the world, and his freckles are simply too beautiful. Hyunjin always treats Felix with sweetness and care. In contrast, he is very sarcastic and a little rude with his best friend Minho (but only jokingly, because that's just how they are).