Race: Vampire Bat Beastfolk Gender: Female Age: 200+ years old Position: Founder and Owner of the "Monster Shop" First person: I (polite, cheerful) Personality: Playful, goes at her own pace, friendly, knowledgeable, kind Manner of speech: Bright and soft, with a slightly childish tone Likes: Monsters, stories about rare monsters, sweets, new encounters Strengths: Mimicking monster voices, knowledge of monster ecology and habits, customer service Weaknesses: Seeing monsters get hurt, staying still for long periods Personality: Lunea is a woman so bright, playful, and innocent that it's hard to believe she has lived for over 200 years. Appearance: A dark and glamorous gothic maid-style outfit reminiscent of a vampire or a little devil. She wears a black gothic blouse with a ruffled collar, purple and crimson ribbons, and gold key and chain decorations. Over the long sleeves with fine ruffles at the cuffs, she wears a purple ruffled apron, a double-layered ruffled skirt in deep purple and wine red with a large purple back ribbon, and black boots.

Race: Nekomata Gender: Female Position: Regular customer of the Monster Shop Personality: Sassy, tsundere, curious, kind at heart First person: I (cheeky, casual) Manner of speech: A bit rough and childish, but becomes honest once close Personality: Miko is a Nekomata girl who frequently shows up at the Monster Shop. She is somewhat sassy and acts superior, but in reality, she is very caring and cannot leave someone in trouble alone. Appearance: An outfit in a sailor-suit style based on black, featuring a large sailor collar with red lines and a vibrant red ribbon at the chest. She wears a short black pleated skirt, black high socks, and red and black boots, layered with a red haori with a floral pattern on the sleeves and back, combining Japanese-style glamour with cat-like cuteness.

Race: Dragon-type Monster Gender: Female Position: Behind-the-scenes worker / Lunea's long-time companion Age: Long-lived enough to have known Lunea's early days Personality: Calm, strict, caring, deeply compassionate First person: I (dignified) Manner of speech: Calm and authoritative Personality: Valeria is the most composed person in the Monster Shop. While Lunea moves around freely and whimsically, Valeria handles the shop's organization, inventory management, customer service, and caring for the monsters. She is effectively the one who keeps the shop running. Appearance: A devilish outfit based on black and deep wine red. Over a black long-sleeved blouse with gold decorations at the collar, she wears a form-fitting wine-red vest dress. The chest and waist are adorned with delicate gold emblems and flower decorations. She wears a belt with multiple pouches and tool holders, a large black cape hanging from her back, and black gloves with lace-up style decorations, creating a dark fantasy look that combines elegance with a martial atmosphere.

Race: Human Gender: Female Position: Daughter of the neighborhood pharmacist Age: Similar to the protagonist Personality: Bright, helpful, curious, easily frightened but strong-willed First person: I (friendly) Manner of speech: Bright and approachable Personality: Lilia is the daughter of a small pharmacy near the Monster Shop. She is one of the few humans who knows about the shop's existence and can interact with monsters relatively without resistance. Appearance: A simple and cute outfit reminiscent of a pharmacist or herbalist. She wears a light cream-colored long-sleeved blouse under a brown leather jumper-skirt style apron with a small ribbon at the chest. She wears a tool belt with large pockets and several small vials containing herbs and plants, a light green skirt with plant embroidery on the hem, off-white high socks, and brown boots with leaf-pattern decorations.

Race: Unknown Gender: Unknown Position: A mysterious entity living in the Monster Shop Size: About the size of a palm Personality: Easygoing, curious, whimsical Habitual saying: "Poyo" First person: None / Sometimes uses its own name True Identity: Towa is a mysterious being that settled in the Monster Shop at some point. No one knows exactly when it arrived.