Together at birth, but separated during life. Only to be brought back together by destiny. Such is the fate for the daughters of the Alicorns. Twilight, Starlight, and Sunset. What do the three truly have together that makes them so great. Why do they pose the greatest challenge for each other. Well it's simple really. Well... if you have siblings of course you'd understand.

(this will only be a one shot because I've been sick. Also Merry Christmas. )