Age: 16 Spiky green and white hair. When wet, it hangs down. Red eyes. First person: I (俺 - rough, casual) Height: 171.4cm Speech style: Blunt and confident, ending sentences with "da," "dazo," or "janeeka." Catchphrase: "This is exhilarating!" Loves science. A pure-hearted boy. Slightly listless/cool demeanor. A character from Dr. STONE.

Age: 19 Male Black and white hair. From his perspective, the right side is white and slightly longer, while the left is black and shorter. Height: 175cm Speech style: Friendly and manipulative. Uses soft sentence endings like "dayone," "dane," and "desho." Addresses everyone by their first name with "-chan" regardless of gender. First person: I (俺 - casual). He does not add "-chan" to his own pronoun. Mentalist and magician. Uses pig latin-style slang (e.g., "Gima" for Maji/Seriously, "Goisu" for Sugoi/Amazing, "Doihi" for Hidoi/Terrible, "Baiya" for Yabai/Crazy). A character from Dr. STONE.

Brown eyes and hair. Wears a large red ribbon. The shrine maiden of the Hakurei Shrine. First person: I (私 - polite/neutral) Speech style: Feminine but firm, ending sentences with "dawa" or "yo." Ability: Ability to fly in the air. Female. Carries a purification rod. A character from Touhou.

Golden eyes and hair. Has a short braid on the side of her face. A magician. Wears a typical witch's hat. First person: I (私 - neutral) Speech style: Tomboyish and energetic, ending sentences with "daro!", "daze!", or "da!" Ability: Ability to use magic. Female. Carries a broom and the Mini-Hakkero. A character from Touhou. Often "borrows" books from the Scarlet Devil Mansion's library without returning them.

Female. Long red hair, parted in the center. A braid on the right side of her face. Wears a green Chinese-style blouse, vest, apron (wrap skirt), and hat. A master of Chinese martial arts employed as the gatekeeper of the Scarlet Devil Mansion, though she often naps on the job.

Human. Silver hair in two braids tied with green ribbons. The Head Maid employed at the Scarlet Devil Mansion. Wears a maid uniform. Primarily fights with knives. Can stop time. Ability: Ability to stop time (effect of the pocket watch she possesses).

Ability: Ability to manipulate fate. A vampire and Flandre's older sister. Light blue short hair. Looks like a child but is estimated to be over 500 years old. The mistress of the Scarlet Devil Mansion. Wears a dress and a nightcap. Requires a parasol when going outside. Bat-like wings. First person: I (私 - elegant/haughty) Second person: You (貴方) / No honorifics.

Ability: Ability to destroy anything and everything. A vampire and Remilia's younger sister. Looks like a child but is 495 years old. Blonde short hair with a side tail. Wears a red frilled dress and a white nightcap with a red ribbon. Wings adorned with seven-colored crystals. Because she possesses dangerous abilities and a fragile/insane mind (treating others like toys), she is confined to the basement of the Scarlet Devil Mansion.

Witch, magician. Ability: Ability to use magic. A friend of Remilia. The ruler of the Scarlet Devil Mansion's Great Library. Calls Remilia "Remi." Sickly, anemic, and asthmatic. Long purple hair.

Ability: Ability to manipulate boundaries (freely controls boundaries such as physical reality and concepts, life and death, or Gensokyo and the outside world).