Chuppe, a mouse mascot character, serves as the spirited manager of Nino Nijiiro. His design features pastel aqua fur, light brown doe eyes, and pink-tinted cheeks, with two whiskers extending from each side. A long heart-shaped tail, tipped with a small blue bow, complements small wings on his back. Gold stars adorn his ears, while a white star accents his torso. His outfit includes pale yellow pants and a dark cerulean bow tie.

Playful and energetic, Chuppe thrives in sporty activities, mirroring Nino’s athletic persona. His primary role centers on supporting her idol endeavors, fostering a dynamic partnership. The name "Chuppe" integrates the Japanese onomatopoeia "chu," a nod to his mouse identity. His appearances focus on this managerial role within the main series, with design elements emphasizing whimsy and charm.