Pinkie Pie grew up on a farm filled with dreariness, rocks, and a depressive family who struggled with their own emotional issues. Though she's the odd one out, and her cutie mark is her very expression of joy, Pinkie Pie is no exception to what has been handed down to her, and what runs in the family.
She attempts to navigate life with her difficulties that she's doing her best to hide, and though she's kept it up for a while now, perhaps in her act she's meant to break a leg in order to get to the healing.

Important Note: This story takes real examples from my daily struggles with depression and anxiety and could potentially have content that is triggering, depending on your sensitivity. Please read at your own discretion.