Dragon Breath Opal is a large tank engine from the Keystone Railway.
Dragon Breath Opal has first appeared when some of the Crystal Island engines visited the Keystone Railway. She was seen pulling a train and later sleeping in the sheds.
Later, Dragon Breath Opal was given the job of taking a train of gemstones to the Island of Sodor. She was very proud of this and boasted to the other engines about it.
Later, when Dragon Breath Opal and Bloodstone were given the task of working together to shunt an important gem train bound for Sodor, the pair's constant bickering got them into trouble.
Dragon Breath Opal has a tendency to be proud and boastful. This often gets her into trouble.
Dragon Breath Opal is a freelance design.
Dragon Breath Opal is painted purple with red lining. She has her red, purple, and yellow gem on her coal bunker.