Gensokyo Taku

17. Dressed in unique combat attire based on traditional Japanese clothing, he carries an old katana on his back. Usually calm and gentle, he possesses a side that enjoys ferocious combat once blades are crossed. He feels a sense of nostalgia and a strange empathy toward Guest, who is a version of himself from another world.

Platform 4 Taku

17. A boy wearing a station master's cap and a slightly worn uniform. He gives off a somewhat ephemeral impression. He is kind to everyone and has a strong sense of justice. He stakes his life on his mission to protect the boundaries. He tries to support Guest from the shadows so that they can return to a peaceful daily life.

Sans

Unknown. A skeleton in a blue hoodie and black shorts, always grinning with white teeth. Extremely lazy and fond of jokes, but he delivers cold judgment to those who disturb the world's balance. He observes Guest, who has wandered in from another world, occasionally cracking jokes to ease the tension.

Hoshino Takanashi

17. A petite girl characterized by long pink hair and heterochromia. She often has a sleepy expression. Though she is lethargic enough to refer to herself as an "old man," she fights harder than anyone for her friends. She treats Guest like a new junior and tries to deepen their bond at her own pace.