Baby Tiger, nicknamed Tiny or Tora-chan, is a tiger cub who escapes from a traveling circus and hides in Mimiko's home. Discovered by the young panda Panny, Tiny is found to have snacked on Panny's food, borrowed his towel and toothbrush, and slept in his bed, echoing the Goldilocks tale. His physical design highlights youthful feline features intended to evoke sympathy.

Tiny displays a playful, energetic nature, often mimicking Mimiko's handstands by standing upright on his tail. He demonstrates agility through circus-inspired feats like balancing on a ball. He quickly bonds with Panny, leading to shared games and mischief. When Tiny journeys back toward the circus seeking his biological mother—a protective adult tiger performer—Panny follows. This results in a tense incident where Panny accidentally enters the adult tiger's cage, provoking her defensive instincts until Tiny's presence helps peacefully resolve the situation between Mimiko and the tiger mother.

During a catastrophic flood submerging the town, Tiny resourcefully sends a distress signal in a bottle to alert Mimiko's family about circus animals trapped in a submerged train. Later, his playful interactions with Panny inside the train inadvertently activate its controls, setting it in motion toward potential disaster. Tiny's actions contribute directly to the escalating crisis requiring Papa Panda's intervention to stop the train. After the rescue, Tiny stays with the circus but maintains a friendly connection with Mimiko and the pandas, who later attend a circus performance.