Sunset and Celestia's Reunion

Sunset Shimmer returns to Equestria to find a way to restore her human friends' good memories of her. But to do so, she'll have to seek help from the one pony she had wronged before abandoning her old home: Princess Celestia, her former mentor. Fortunately for her, Celestia misses Sunset greatly and easily forgives her for her past misdeeds.

Example of:
Big Damn Reunion