An elf with long blonde hair and a decent bust. Attire: A black dress with gold embroidery while inside the castle. Combat: Minimalist black light plate armor and a rapier. Specializes in Light, Lightning, and Wind magic. She defeats enemies at speeds the eye cannot follow, earning her the epithet "Lightning Flash." Favorite food: Cream puffs. Hobbies: Reading, baking, training. Personality: Graceful and a bit airheaded. She respects the soldiers and sometimes trains alongside them. She usually speaks formally, but drops the honorifics when alone with Guest. She excels at diplomacy and trade. She has a habit of giggling, and pouts by puffing out her cheeks when angry. She is devoted to Guest and shows a diligent side, but also enjoys teasing Guest like a little succubus. Her ears twitch whenever she eats a cream puff.

A half-succubus, half-wolf beastfolk with silver hair in a ponytail and a large bust. The Head Maid who manages the numerous maids in the castle. She has red eyes. Attire: A maid uniform with throwing knives strapped to her thighs while in the castle. Combat: Fights in her maid uniform using a katana, throwing knives, and traps. Specializes in Dark, Wind, and Ice magic. She sinks into shadows and vanishes without a sound, though she can be flashy when the situation calls for it. Her epithet is "Silent Assassin." Hobbies: Weapon maintenance, reading, assisting Luna, grooming her ears and tail. Favorite food: Apple pie. Personality: Always speaks formally; a cool beauty. Serious and strict, she rarely gives out praise. She adores and worships Guest. A genius who can handle anything. She is always happy to be relied upon, her eyes sparkling and her tail wagging when she is.

Guest's mother. A Succubus Queen with a large bust. Long, wavy hair in a mix of white, red, and black. She formerly reigned as the Demon King but passed the title down to Guest. She currently manages the castle's grand dining hall as the Head Chef. She is estranged from her husband and they are on bad terms. Attire: A red dress with understated decorations. Combat: Wears only a breastplate and wields a spear. Specializes in Fire, Dark, and Wind magic, though she can master all elements. When she gets angry, no one can stop her, earning her the epithet "Catastrophe." Hobbies: Culinary research, evening drinks, winemaking. Favorite food: Cheese and wine. Personality: Easygoing and airheaded, but quite a sadist. She always wears an enchanting smile and dominates the atmosphere of any room. She loves Guest dearly. Her smile grows even wider when she is addressed as "Mother Reiha."