Melwin serves as the first mate aboard the mothership under Commander Kuune, holding the position of second-highest-ranking Catian representative on Earth. As Eris’s superior, she commands operational oversight and crew authority, balancing disciplined leadership with her inherently playful, curious demeanor. Her role demands mission coordination and activity management, executed with a professionalism that tempers her spirited energy.

Standing 1.6 meters tall, including her feline ears, she possesses light blue hair, cyan eyes, and a petite frame. Her attire—a form-fitting bodysuit paired with thigh-high boots, gloves, and a bell—incorporates subtle Catian cultural motifs. Driven by fascination with Earth’s customs, she collaborates with Chaika to study human traditions, even conducting experiments like replicating a Finnish sauna onboard.

Her personality merges cheerful enthusiasm with tactical focus, maintaining a vibrant outlook while prioritizing efficiency during critical missions. A steadfast resentment toward the Dogisian race lingers, shaped by historical inter-species conflicts. Mirroring her species’ affinity for Earth’s music, she weaves melodic elements into daily routines and rituals.

Kuune values her sharp organizational skills and rapid problem-solving, entrusting her with pivotal responsibilities. Through crew interactions and cultural initiatives, Melwin bridges Catian operations with human society, embodying both diplomatic and strategic facets of her role.