Spike is a purple and green dragon. He is Twilight Sparkle's friend and assistant.
Twilight hatched Spike from an egg as part of an admission exam for a school of magic run by Celestia, gaining both her cutie mark and a chance to study under Celestia's direct guidance. His greatest achievement is saving the Crystal Empire.
He frequently displays a sardonic personality and laughs at others' misfortunes, but can be counted on to help Twilight and her friends when they need him.