Clown phase

Accident
During her 7th year in middle school, grace suffered a terrible accident when Fluttershy hit her on the head with her purse, causing several lobes of her brain to become severely altered. This resulted in Grace becoming more of a clown than she was before, going as far as dressing up as one and performing fortnite dances in front of all her friends. Although these dances were very nice, her stench would prevent any spectators from viewing the spectacle from any reasonable distance.

Recovery
Grace was able to recover from the incident as she gradually lost all her friends due to her stench, causing her to spiral into a depressive state which canceled the normally overjoyed clown grace. Eventually, she began taking off the clown costume and finding her true self, an alien from Stinktopia. As she went into high school, she was taken away from Fluttershy after 2 and a half years of abuse, which sped up the recovery process.