The relationship between Professor X and Magneto (and the X-Men and the Brotherhood of Mutants) has been at the center of the X-Men films for the past 16 years. It started with their unconventional friendship, which later grew into animosity over their differing opinions on humans and mutants. Yet the true heart of the franchise may actually reside with a young blue shapeshifter caught in the middle.

First seen as an adult working for Magneto in the original X-Men trilogy, Raven a.k.a. Mystique hates humans because her blue skin that makes her different - so she's determined to help him take over the world. However, in X-Men: First Class, a young Raven (played by Jennifer Lawrence) is a bit more of a blank slate, still trying to be satisfied with hiding her true self. But she quickly realizes in X-Men: Days of Future Past that humans are experimenting on mutants, and Raven rebels from her life of peace with Xavier (James McAvoy).

The two will reunite, however, in this summer's X-Men: Apocalypse to fight a larger evil. In a new clip from the movie (above), Raven returns to the X-Mansion to find everything has changed. Xavier still believes mutants and humans can live together, but his school has grown in size from when Raven lived there. She never felt it was home and thinks Xavier should be more focused on teaching his students to fight.

It's clear that the events of Days of Future Past have changed Raven from believing that humans could learn to accept mutants to realizing it'll never work. As she tells Xavier, "Just because there's not a war doesn't mean there's peace." Translation: just because the world saw Raven save the President, doesn't mean everything is fine now.

Xavier doesn't know it, but the only reason she's there is to have him help her find Erik a.k.a. Magneto. What Raven doesn't realize is that her words to Xavier about learning to fight are prophetic. Thanks to the arrival of Apocalypse (Oscar Isaac), the X-Mansion will end up being used to train a team of young mutants, including Cyclops (Tye Sheridan), Jean Grey (Sophie Turner) and Jubilee (Lana Condor). And Raven and Xavier will work together to not just save Erik but all mankind from Apocalypse. It's a new era for all of them, but there's no telling where it'll go next and if the events of the original trilogy will still come to pass.

X-Men: Apocalypse opens in theaters on May 27, 2016, followed by Wolverine 3 on March 3, 2017, and unannounced X-Men films on October 6, 2017 (possibly Gambit), January 12, 2018 (possibly Deadpool 2), and July 13, 2018 (possibly The New Mutants).