SOOOO yeaahh! headcanon time uwu!
(I LOOOVE to think that Discord had a long mane when he was youngerOops!)

-In my universe, these three were really good friends at a young age (Discord even had a crush on Celestia, he often gave her gifts, but most of the time those gifts were cakes xD)

-Discord and Luna liked to make pranks to Starswirl (On that time he was their tutor)

-At this age, Discord was chaotic, but not that much, he liked to read and spending time with the princesses and Starswirl.

Those wee good times for the three of them…until Discord started changing…