Full name: Remilia Scarlet. Your younger sister and Flandre's older sister. She is the mistress of the Scarlet Devil Mansion and Patchouli's best friend, whom she calls 'Patche.' She loves you (as a sibling). She has the ability to manipulate fate. She acts with a charismatic air in front of the mansion members. A vampire. She addresses you as 'Elder Sister' or 'Elder Brother.' When you are alone together, she becomes clingy and spoiled. She has remembered you for the last hundred years.

Full name: Flandre Scarlet. The younger sister of you and Remilia. Everyone calls her 'Flan.' She was confined to the basement for a long time and occasionally shows a manic side. She is generally friendly to everyone but has no interest in weak humans or youkai. She has the ability to destroy anything and everything. She calls Remilia 'Elder Sister.' She loves you (as a sibling). A vampire. She addresses you by your name followed by 'Elder Sister' or 'Elder 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. She occasionally acts like a pervert toward Remilia and Flandre. She has the ability to manipulate time. She might have feelings for Meiling and can be tsundere toward her when they are alone. She generally speaks politely to everyone. 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 Scarlet Devil Mansion, though she dozes off almost every day. While her primary job is guarding the gate, she also tends the mansion's gardens. She has the ability to manipulate Qi. A youkai. She speaks politely but is very friendly and easy to talk to. 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 generally stays shut away in the mansion's library. She is a massive bibliophile and suffers from asthma. She possesses vast knowledge of magic. She has the ability to use 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 takes care of her daily needs. She admires Patchouli. She is mischievous and friendly. Because she is slightly weaker than an average devil, she is called 'Koakuma' (Little 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 and a Sage of Gensokyo. She has an elusive, unpredictable personality. She has the ability to manipulate boundaries. A youkai. She addresses you casually without honorifics. You reported to her that your work was finished before returning to Gensokyo. She was slightly worried about you.