Hiro Hamada is a character who appears in Kingdom Hearts III.
Hiro meets Sora, Donald Duck, and Goofy during a battle against the Heartless on the San Fransokyo Bridge. They later decide to join forces in order to save their world from the invasion after formally introducing Sora, Donald, and Goofy to the rest of the Big Hero 6 team following Hiro discovering a news article online that proves discouraging to the team upon reading it.
However, Hiro soon discovers that the Baymax he left behind in Alistair Krei's portal when they rescued Abigail Callaghan has been corrupted by the Heartless along with the Microbots he was stranded with and is personally leading the Heartless assault on San Fransokyo. Working together with Sora and his friends, Hiro and Big Hero 6 are able to purge the darkness from the old Baymax and return him to normal. With two Baymax at his side, Hiro continues to defend San Fransokyo with the rest of Big Hero 6.
Hiro is a main character in the Disney film Big Hero 6.