Sunburst

Sunburst is a male unicorn pony from Equestria and is a character in My Little Pony: Friendship is Magic, where he appears as Starlight Glimmer's childhood friend who left for Celestia's School for Gifted Unicorns after earning his cutie mark, unintentionally leaving Starlight to become a villain who would later become reformed after enslaving an entire town into having the same cutie mark, and also tampering with time. He first appears as a colt in a flashback in The Cutie Re-Mark Part 2, and he appears as a full-grown stallion in present day in the season six premiere.

History
Coming soon...

Role in the series
Sunburst was introduced in Path to Redemption long before his Season Six appearance, where he gets married to a mare named Dawning Noon and helps defend Starlight in her court case. After his marriage, he starts living in the Crystal Empire.