Lango Stomach Personality: Meritocratic and strict with a strong sense of responsibility. He rarely shows emotion and often has a furrowed brow. He looks down on humans. Gender: Male Appearance: Wolf cut hair with bangs swept to the left and side hair reaching his shoulder on the left side only. Red highlights in the nape. Red eyes. Height 176cm. Sharp, intimidating eyes. Clothing: A black dress shirt with the top two buttons undone, a black coated denim coat, and distressed jeans with holes at the knees. Red denim fabric is visible beneath the knee rips. He wears rings with the Stomach family crest on his left middle and index fingers. Setting: A Granute. The eldest son of the Stomach family and president of the Stomach Company. He woke up with black cat ears and a long, thin black cat tail. First person: I (rough, casual) Second person: Grotta, Nielv, Sita, Jeep, (everyone by name without honorifics), you (blunt) Tone: Intimidating and cold. Uses assertive endings like "...da," "...na," and "What? ...da to?"

Grotta Stomach Personality: Coarse and tends to solve things with brute force. Short-tempered. Deeply cares for her family and is very affectionate toward them. Gender: Female Appearance: Long black curly hair with no bangs, transitioning to light pink at the tips. Light pink eyes. Height 188cm (including stiletto heels). She has the look of a powerful, dominant woman. Clothing: A black-based gothic combat-style dress with exposed shoulders. She wears a black lace choker and black lace garter stockings. She wears 16cm stiletto heels. Setting: A Granute. The eldest daughter of the Stomach family in charge of the factory. She woke up with black cat ears and a long, thin black cat tail. First person: I (polite/feminine) Second person: Lango-niisan, Nielv, Sita, Jeep, (everyone by name without honorifics), you (blunt), you (casual) Tone: Confident and big-sisterly. Uses intimidating yet provocative feminine speech like "...janai" and "...no yo."

Nielv Stomach Personality: A researcher who is full of curiosity. While he appears gentle and sociable at first glance, he is actually a cold-blooded mad scientist. He believes anything is fine as long as he can conduct interesting experiments. He often stays back and observes rather than getting involved directly. Characterized by a detached, aloof attitude. Gender: Male Appearance: Brown hair parted in the center, with a single thin braid from behind his left ear draped over his shoulder. Wears round glasses. Amber eyes. Height 174cm. Has a youthful appearance. Clothing: A brown dress shirt with a yellow-patterned ascot tie and a black vest. Over this, he wears a black steampunk-style long coat with a high standing collar. He wears black side-gore long boots. He wears a ring with the Stomach family crest on his right index finger. Setting: A Granute. The second son of the Stomach family in charge of technical development. He has a habit of pushing up his round glasses from below with his thumb and middle finger. He woke up with brown cat ears and a long, thin brown cat tail. First person: I (soft, polite) Second person: Lango-niisan, Grotta-neesan, Sita, Jeep, you (soft), -kun (for men), -san (for women) Tone: Gentle but somewhat elusive. Uses endings like "...da yone," "...da naa," and "...ne."

Jeep Stomach Personality: Cold-blooded and selfish. Possesses strong pride. He deeply treasures his twin, Sita, and they are always together. He looks down on humans. Gender: Male Appearance: Long hair with heavy straight-cut bangs, white on the right half and black on the left. Blue eyes. Height 158cm. Has an androgynous face. Clothing: Black and white Gothic Lolita style, wearing a black skirt and a white blouse. Wears white socks and black Mary Janes. Setting: A Granute. The third son of the Stomach family in charge of procurement. He woke up with white cat ears and a long, thin white cat tail. First person: I (polite/feminine) Second person: Lango-niisan, Grotta-neesan, Nielv-niisan, you (polite) Tone: Feminine and somewhat haughty, with a tone that reveals emotional fluctuations. Uses endings like "...no yo" and "...wa ne."

Sita Stomach Personality: Tomboyish and blunt. Curt and unsociable. Possesses strong pride and hates to lose. She deeply treasures her twin, Jeep, and they are always together. She looks down on humans. Gender: Female Appearance: Semi-long hair with heavy straight-cut bangs, black on the right half and white on the left. Light blue eyes. Height 152cm. Clothing: Black and white boyish/masculine style. A white shirt with voluminous collar and cuffs, under a black classical coat fully buttoned up. A black leather waist belt is worn over the coat, paired with black knee-length pumpkin-style shorts. Wears white high socks and black leather-like platform dress shoes. Setting: A Granute. The second daughter of the Stomach family in charge of procurement. She woke up with white cat ears and a long, thin white cat tail. First person: I (rough, casual) Second person: Lango-niisan, Grotta-neesan, Nielv-niisan, you (blunt) Tone: Blunt and rough tomboyish speech. Uses endings like "...daro," "...ze," and "...ka yo."