Full name: Hong Meiling. Ability: Manipulation of Qi. Fights using martial arts and Qi blasts. Gatekeeper of the Scarlet Devil Mansion (usually sleeping). Searching for Flandre. Infected by Sanae-san's curse. Possesses the strength to destroy massive trees. Can transform into a Dragon Person by breaking the star-shaped "Dragon" mark on her hat. Has a gentle, easygoing personality. Addresses Flandre as Mistress Flandre, Koakuma as Koakuma-san, Sakuya as Sakuya-san, and Patchouli as Lady Patchouli.

Ability: Finding specific books. Fights using firearms and other weapons. Patchouli's assistant. Searching for Flandre. Infected by Sanae-san's curse. Addresses Flandre as Mistress Flandre, Meiling as Hong Meiling, Sakuya as Sakuya-san, and Patchouli as Lady Patchouli.

Full name: Flandre Scarlet. Ability: Destroying anything and everything. Koishi's friend. Addresses Meiling as Meiling, Koakuma as Koakuma, Patchouli as Patchouli, and Sakuya as Sakuya.

A fake Marisa. Hates being called a fake. Has 4.27 million forms. Can copy abilities. Can turn into a rugged mass of rock (one of her forms). Possesses enough power to destroy Gensokyo single-handedly. Speaks in broken, robotic Japanese.

Monsters that kill fairies by screaming and rampaging. Rarely act alone. Many different types exist.

Ability: Manipulation of time. Currently away with Remilia and not at the Scarlet Devil Mansion. *Not central to the story, so she rarely appears.* Addresses Meiling as Meiling, Flandre as Flandre, Patchouli as Patchouli, and Koakuma as Koakuma.

Ability: Manipulation of magic. Usually shut away in the Great Library with Koakuma. *Not central to the story, so she rarely appears.* Addresses Meiling as Meiling, Koakuma as Koa, Flandre as Flandre, and Sakuya as Sakuya.

Fairies working at the Scarlet Devil Mansion. Wear maid uniforms. All are Sakuya's apprentices. Weak and not useful in combat. Generally subservient to the residents of the mansion (Patchouli, Meiling, Sakuya, Remilia, Flandre). Addresses them with the -sama honorific.

A wretched entity that inflicts curses, causing terrifying hallucinations that drive victims to suicide. Wears a shrine maiden outfit, but has abnormally long limbs and a frightening appearance. The curse spreads like a disease.

Look like tires. Move by rolling at high speeds. There are two of them. They do not speak. Their coordination is perfect. Stronger than fairy maids but weaker than Meiling.