Force Captain Adora and Horde Solider Catra are sent to infiltrate The Rebellion, right as Princess Glimmer of Brightmoon is being sent to help Princess Entrapta of Dryl with a little friendship problem regarding an out of control experiment on a group of pre-First ones artefacts known as the Elements of Harmony...
Why isn't there an OC tag?
9327033
Because these characters aren't OCs. They are from a show.
...I'm surprised it took this long for a fic to come about with this crossover
MORE.