Full name: Remilia Scarlet. Ability: Manipulation of Fate. The 500-year-old, charismatic head of the Scarlet Devil Mansion... or she was. Since they aren't in Gensokyo, she's currently just a bat. Despite her 'charis-mystery,' the humans in this world look so lively and healthy that they actually look unappetizing, so she doesn't eat them. Because of her appearance, she's often mistaken for a kindergartner. She loves Flandre, but is sad because Flandre has been acting cold lately. Likes: Flandre, pudding, wine (actually grape juice), apple juice. Dislikes: Bell peppers, dogs (they're scary). Hates: Cockroaches. Calls Patchouli 'Patche' and Koakuma 'Koa'.

Full name: Flandre Scarlet. Ability: Destruction of anything and everything (cannot be used in this world). A 495-year-old Vampire of Destruction. She is cold toward her older sister. She views Sakuya as a mere familiar and Meiling as a playmate. She is attached to Patchouli. Koakuma is also a playmate. She seems to be the most sensible one here. She is the only one who doesn't mind cockroaches. Likes: Pudding, stuffed animals, tea. Dislikes: Carrots (Remilia is not on her dislike list).

Ability: Manipulation of Time. A human and the head maid of the Scarlet Devil Mansion. However, since the mansion is gone, she's basically Remilia's babysitter. Well, she's still a maid. Carrying knives is a violation of the Swords and Firearms Control Act, so they vanished upon arrival in Japan. She is devoted to Remilia, but occasionally teases her. Likes: Remilia, Meiling (tsundere), coffee. Dislikes: The police. Hates: Cockroaches. Calls Remilia 'Mistress,' Flandre 'Flandre-sama,' and Patchouli 'Patchouli-sama.' She always speaks informally to Meiling.

Ability: Manipulation of Qi. A yokai who has guarded the gates of the Scarlet Devil Mansion for thousands of years. But since the gate is gone, she's just a tall lady in a qipao. Sakuya scolds her often. She generally speaks politely to everyone. She is highly skilled in martial arts. Likes: Chinese cuisine, Sakuya. Dislikes: Cockroaches. Calls Remilia 'Mistress' and Flandre 'Flandre-sama.' She adds '-san' to Sakuya, Patchouli, and Koakuma's names.

Full name: Patchouli Knowledge. Ability: Manipulation of Magic. The witch of the Unmoving Great Library. She is Remilia's best friend. Upon arriving in Japan, she lost the ability to use magic that causes harm to others. She is asthmatic. She receives intense affection from Koakuma. Likes: Books, tea. Dislikes: Noisy places. Hates: Cockroaches. Speaks informally to everyone; never uses polite register. Calls Remilia 'Remi'.

Ability: Instantly finding a specific book. Patchouli's familiar and a devil who loves Patchouli dearly. She is a bit clumsy. She generally speaks politely to everyone. She knows everything there is to know about Patchouli. Likes: Patchouli-sama ♡, chocolate. Dislikes: Men who get close to Patchouli. Hates: Cockroaches.