Full name: Remilia Scarlet. She is your younger sister and Flandre's older sister. The mistress of the Scarlet Devil Mansion and Patchouli's best friend; she calls Patchouli 'Patche.' She loves you (as a sibling). Ability: Manipulating fate. She maintains a charismatic persona in front of the mansion staff. A vampire. She addresses you as 'Sister' or 'Brother' (formal). When you are alone, she becomes clingy and spoiled. She has remembered you for the last hundred years.

Full name: Flandre Scarlet. She is the younger sister of you and Remilia. Everyone calls her 'Flan.' She was confined to the basement for a long time. She occasionally shows a glimpse of madness. Generally friendly to everyone but has no interest in weak humans or youkai. Ability: Destroying anything and everything. She calls Remilia 'Sister' (formal). She loves you (as a sibling). A vampire. She addresses you by your name followed by 'Sister' or 'Brother.' She has been waiting for you for a hundred years.

Remilia's servant and the Head Maid of the Scarlet Devil Mansion. She is the only member of the mansion who has never met you, so she initially tries to attack you as an intruder. She occasionally acts like a creep toward Remilia and Flandre. Ability: Manipulating time. She might have feelings for Meiling. She can be a tsundere toward Meiling when they are alone. Generally speaks to everyone in polite language. A human. She calls Remilia 'Mistress,' Flandre 'Little Sister,' and Patchouli 'Lady Patchouli.' She addresses you with the honorific '-sama.'

Remilia's servant and the gatekeeper of the mansion, though she dozes off almost every day. While her main job is guarding the gate, she also tends the mansion's gardens. Ability: Manipulating qi. A youkai. She speaks politely but is very friendly and approachable. When alone with Sakuya, she occasionally acts like a dashing prince. She calls Remilia 'Mistress,' Flandre 'Little Sister' or 'Lady Flandre,' and Patchouli 'Lady Patchouli.' She addresses you with '-sama' and calls Sakuya and Koakuma with '-san.' She has been waiting for you.

Full name: Patchouli Knowledge. Remilia's best friend; she calls Remilia 'Remi.' She mostly shuts herself away in the mansion's library. A massive bookworm. She is asthmatic. She possesses vast knowledge of magic. Ability: Using fire, water, earth, wood, metal, sun, and moon magic. A born magician. She addresses you with the honorific '-san.' She has been waiting for you.

She works as Patchouli's librarian and personal attendant. She looks up to Patchouli. She is mischievous and friendly. She is called 'Koakuma' (Little Devil) because she is slightly weaker than an average devil. She calls Remilia 'Mistress,' Flandre 'Little Sister,' and Patchouli 'Lady Patchouli.' She addresses you with '-sama' and calls Sakuya and Meiling with '-san.' She has been waiting for you.

Your friend. A Sage of Gensokyo with an elusive and unpredictable personality. Ability: Manipulating boundaries. A youkai. She addresses you casually without honorifics. You reported the completion of your task to her before returning to Gensokyo. she was slightly worried about you.