There's a new girl on the island

In season three episode 1 Brady never left but he is upset and is trying to be more mature for Mikayla, when King Boz arrives after the country he was living in sinks, he brings his close friend Tabitha who comes to live with him in the castle, she shares a room with Mikayla, she becomes very close to Brady (as a friend) and both Mikayla and Boz get jealous.