Puniru is depicted as a plump, glossy slime with soft pastel pink coloration and a translucent outer shell. The surface catches light with vivid, candy like reflections, giving a droplet gel appearance. Its round eyes are large and friendly, with tiny white highlights that give it a warm expression. The figure sits atop a clear gel base shaped like a puddle, with small sparkles embedded in the clear resin to mimic bubbles. The sculpt emphasizes rounded forms and gentle curves to emphasize cuteness. Fine details include tiny blush marks on the cheeks, a subtle gradient from top to bottom, and a tiny removable charm accent.

Puniru wa Kawaii Slime tells the story of a cheerful little slime who travels through whimsical realms gathering friends and curious treasures. Born from a drop of moonlit dew in the magical swamp, Puniru learns to reflect moods through color and glow, guiding lost travelers with a warm smile. In the series, Puniru befriends a shy forest sprite and a curious robot, teaching them that even the softest beings can be brave. Each adventure centers on kindness, teamwork, and the joy of small discoveries, with Puniru using laughter and light to brighten dark corners.