Holly Blue is a freight car from Crystal Island.
Holly Blue first appeared in Remembering Pink, when she tried to help comfort Blue. She was later shown being rude to some of the other quartzes.
Holly Blue is very authoritative. She is also very rude to other quartzes, as she thinks she is better that all of them. She has also been seen being very kind to Blue, who is her closest friend.
Holly Blue is based on a 7-plank open wagon.
Holly Blue is blue with black wheels. She also has her name on her in black. Her gem is on her sides.