Because every time she has to raise the sun on that day, she's reminded of a mother figure who's no longer there. She's reminded of the centuries that have passed and of the friends who are now only memories and a monument in the centre of Canterlot which has been made eternal and indestructible by the subtlest, most powrful and most advanced magic Twilight and Sunset can wield.



As much as Sunset understands and will never shirk her duty, some days the weight on her shoulders and the price she has paid for this destiny are almost unbearable.



If she could go back in time, Sunset Shimmer would have told that teenage version of her that so desperately wanted to be a princess: "No. No, you don't want this. The price is too high."