Migirin is a hyper teddy bear-like creature from the Mirror Kingdom, almost always accompanied by his brother, Hidarin. He has yellow fur, blue hair, and brown eyes, and wears a red hat, a red costume, a white shirt with pink stripes, and brown pants. He carries a Miracle Light in his pocket.

Migirin is very kind but too weak to protect himself and is easily scared. After Shadow takes the crystals of the Mirror Kingdom and threatens their homeland, Migirin and Hidarin are forced to serve him. Shadow promises to return the crystals if they steal the Dream Collet from the Pretty Cures. Fearful of his power and desperate to save their kingdom, they comply despite their non-malicious nature.

They use a Miracle Light on a mirror to create a reflection of Nozomi, which Shadow transforms into Dark Dream. Later, at Princess Land, they disguise themselves as reflections to kidnap Coco and Nuts, replacing them to deceive the Pretty Cures into surrendering the Dream Collet. When discovered, they use Kowaina Masks from Shadow to become monsters, but are defeated and revert to their original forms.

Captured by the Pretty Cures, Migirin and Hidarin are intimidated by Milk into revealing that Coco and Nuts are in the Mirror Kingdom. They guide the team there, now a wasteland under Shadow’s control. When Shadow attacks Milk, they hesitate out of fear but soon feel remorse.

Overcoming their fear, they rebel against Shadow, saving Milk from an attack and aiding in the rescue of Coco and Nuts. Using their Miracle Lights, they free the two from the mirrors where they were trapped. They later help empower the Pretty Cures by using their lights alongside Coco, Nuts, and Milk, enabling Shadow’s defeat. Afterward, the Mirror Kingdom is restored.

Migirin and Hidarin make cameo appearances in later Pretty Cure All Stars films, including DX3 and Miracle Universe.