Chrysalis has come down with some sort of ailment, and you're too ill-equipped to help her by yourself. But how can you get help when neither Chrysalis nor those who are capable of assisting her are willing to leave the past behind?
After being accidentally transported to Equestria, a series of happenstances netted you one request from Princess Celestia herself. Why did you choose to have tea?
After ending up in an Equestria ruled by Nightmare Moon, you somehow became the tyrant's favorite subject, while she somehow fell in love with you. Maybe there is something more to her hidden beneath that cruel exterior.