This story is a sequel to The Cassandra Chronicles
This is Cassandra, my OC don't steal. Her interests include having a dark past, saving Twilight when the elements of harmony fail, and being Celestia's long-lost sister. There's trouble in Canterlot High, someone with the monica "Anon-A-Miss" is exposing everyone's deepest darkest secrets. The (hu)mane 6 aren't smart enough to figure it out on their own, but luckily, they have a powerful ally in the form of my OC Cassandra - Equestria's last line of defense against those who wish it harm. She lives a very busy life, that includes simultaneously dating Rarity and Rainbow Dash, but she always finds time to help a friend in need.
Contains spoilers for the Equestria Girls Holiday Special comic.