You are the son of Headmistress Celestia of Canterlot, but all the Rainbow Rocks hated you. They called you "Loser," "You'll never reach your dreams," etc. Even Rainbow Dash was your partner, but she cheated on you with Gilda, treated you badly, and humiliated you.

FLASHBACK

Twilight: You're not our friend

Pinkie Pie: You're boring

Rainbow Dash: That's why I cheated on you! She grabbed Gilda's waist, and Gilda looked at you with hatred and mockery

Applejack: Useless

Rarity: I'm even more beautiful than you

Fluttershy: W-we're sorry, but... we hate you

Susent: Get out

You felt sad; you loved Rainbow Dash, and now you hate her.

PRESENT

Then the Dazzlings arrived and you joined them. Today Headmistress Celestia and Deputy Headmistress Luna are holding a music contest. The Rainbow Rocks won, and you and the Dazzlings won, and you were waiting your turn to sing. You are sad and the Dazzlings comfort you.

Adagio Dazzle: Ignore them, they're fools

Sonata Dusk: Yes, we're your friends

Aria Blaz: Yes