Koro is Sawako's pet puppy in Koro's Big Day Out. He escapes and runs away from his home when Sawako unintentionally leaves the front gate open and embarks on an adventure through the streets of Tokyo before being reunited with Sawako.
Koro's fur is mostly white but the fur on the top of his head, ears and around his eyes is brown. He also wears a blue collar.
See also: Koro/Gallery