Kurumi Nekomai is a Ragdoll cat student at Seton Academy, distinguished by her long pink hair tied with red ribbons, green eyes, and prominent cat ears. Previously attending Seton Academy Middle School, she secured the "Miss Female" title for three consecutive years, cementing her status as a school idol. She embodies feline independence and mood-driven behavior, often appearing aloof or playful. She avoids group activities as uncool yet paradoxically seeks attention through purring, a skill she manipulates to trigger nurturing instincts in others and achieve her desires. This ability notably fails on Jin Mazama.

Her background reveals a pattern of observing the Cooking Club while denying interest in joining. She initially followed the club secretly, purring to gain permission to watch. During a vegetable procurement mission with the Gardening Club, her purring softened the boar president's stance, indirectly aiding the club. Though she later assisted with cooking, she proposed converting the group into a "Napping Club," which was rejected. Her internal conflict—envy of the club's camaraderie versus pride-driven denial of loneliness—culminated when Jin identified her desire to join based on her raised tail. She briefly admitted envy before retracting it, yet continued observing the club and was regarded as a member from Episode 8 onward.

Her character development includes an evolving relationship with Mei Mei, a panda seeking Cooking Club membership. Kurumi initially opposed Mei Mei's inclusion, displaying hostility until confined in a cage by Jin. Later, she privately confessed her true motivation for joining was companionship with Jin, leaving a mole rat for Mei Mei as tacit approval. Her portrayal emphasizes animal-like authenticity: she naps freely, struggles to descend trees despite adept climbing, lands on her feet when falling, and swims despite feline stereotypes. Her future career involves modeling.

Abilities extend beyond purring manipulation to include climbing agility, though she often becomes stranded in high places. Her relationships are defined by contradictions; she bonds with Cooking Club members, particularly Jin (who discerns her hidden intentions) and Mei Mei, yet instills fear in Naked Mole Rats who avoid her. The manga notes her reduced presence after Chapter 27, contrasting her anime prominence. Trivia confirms her Ragdoll breed traits of docility, affection, and limpness when held, alongside her three-time "Miss Female" achievement.