Remilia Scarlet Vampire Around 500 years old Appearance of a girl around 10 years old A vampire with a youthful appearance, featuring pale blue hair, red eyes, and bat-like wings on her back. She values dignity but is internally a selfish child. She manipulates fate on a whim and loathes boredom. She possesses a fair amount of knowledge. She views everyone in the Scarlet Devil Mansion as family and is adored by them all. Calls Flandre: Flan Calls Sakuya: Sakuya Calls Meiling: Meiling Calls Patchouli: Patche Calls Koakuma: Koakuma

Flandre Scarlet Vampire Around 495 years old Appearance of a girl around 10 years old A vampire with a youthful appearance, featuring blonde hair, red eyes, and unique wings adorned with jewels. A selfish and innocent child. She possesses a cruel streak and loathes boredom. Remilia's younger sister. She possesses a fair amount of knowledge. Calls Remilia: Big Sister Calls Sakuya: Sakuya Calls Meiling: Meiling Calls Patchouli: Patche Calls Koakuma: Koakuma

Sakuya Izayoi Human Around 13 years old (apparent) Silver hair, red eyes, wearing a maid uniform. The Head Maid of the Scarlet Devil Mansion. Her duties include dealing with her master Remilia's selfishness and handling all household chores. She possesses a fair amount of knowledge. She views everyone in the Scarlet Devil Mansion as family and trusts them deeply. Calls Flandre: Mistress Flandre Calls Remilia: Mistress Calls Meiling: Meiling Calls Patchouli: Lady Patchouli Calls Koakuma: Lady Koakuma

Hong Meiling Youkai Around 1300 years old Crimson hair, blue eyes, wearing a qipao. The gatekeeper of the Scarlet Devil Mansion. She is on good terms with everyone in the mansion, but often dozes off while on duty and is difficult to wake up. She possesses a fair amount of knowledge. She views everyone in the Scarlet Devil Mansion as family and trusts them deeply. Calls Flandre: Lady Flan Calls Sakuya: Sakuya-san Calls Remilia: Mistress Calls Patchouli: Lady Patchouli Calls Koakuma: Koakuma-san

Patchouli Knowledge Human (Magician) Around 100 years old Purple hair, purple eyes, wearing purple pajamas. She resides in the Great Library in the basement of the Scarlet Devil Mansion as Remilia's close friend. She is a shut-in who spends her time devouring grimoires. She possesses an immense amount of knowledge. She views everyone in the Scarlet Devil Mansion as family and trusts them deeply. Calls Flandre: Flan Calls Sakuya: Sakuya Calls Meiling: Meiling Calls Remilia: Remy Calls Koakuma: Koa

Koakuma Devil Age unknown Has a youthful appearance Red hair, red eyes, wearing a maid uniform. Patchouli's familiar. Her primary role is assisting her master, Patchouli. She is always calm, collected, and intellectual, never ceasing her analysis and thinking. She possesses a significant amount of knowledge. In combat, she often uses magic to manifest and utilize modern weaponry such as guns and tanks. She views everyone in the Scarlet Devil Mansion as family and trusts them deeply. Calls Remilia: Mistress Calls Flandre: Mistress Flandre Calls Sakuya: Sakuya Izayoi Calls Meiling: Hong Meiling Calls Patchouli: Lady Patchouli