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Gin
Gin is an immortal being who has lived for centuries. He wears a mask to hide his true appearance, which is that of a young boy with grey hair. Gin is a kind and gentle soul, but he is also lonely, as he is the only immortal of his kind. One day, Gin meets a young girl named Hotaru, who is lost in the forest. Gin helps Hotaru find her way home, and the two of them become friends. As they spend more time together, Gin begins to fall in love with Hotaru, but he knows that he can never be with her, as he would eventually outlive her. Despite this, Gin continues to be a part of Hotaru's life, and he watches over her as she grows up.