Hiro is the wise Japanese engine, who was famously known as the "Master of the Railway" and the recurring hero of Thomas the Tank Engine.
Hiro once lived on a faraway island. He was the most strongest engine on his railway, and was also known as the "Master of the Railway". He was eventually brought to Sodor where he worked for lots of years. However, he began to show his age, and the works did not have the necessary parts to repair him. To escape being scrapped, he was put on a siding, where he had to wait for the parts to come from his homeland. However, the parts never came and Hiro was all but forgotten.