Harold

Harold is a helicopter who patrols the Island of Sodor, searching for emergencies. He is part of the Search and Rescue Team.

Personality
Harold is helpful and always highly alert whenever there is an emergency, especially on patrol. However, there are times when he can be a bit of a goofball, often getting into wacky shenanigans.

There has been a few times where Harold has rebelled against the engines. One of these moments was in "Thomas Vs Duck" when he joined the Duck Army and tried to take down the Thomas Army with a gun. But he ended up failing due to a Thomas throwing a freight car at him causing him to explode.