Complex sentence: McDonald said that Jett would get on some of the other character's bad sides, especially VJ Patterson's (Felix Dean), while he would also make an enemy of Gina Austin (Sonia Todd), the principal of Summer Bay High.
Split into simpler sentences: McDonald said that Jett would get on some of the other character's bad sides, especially VJ Patterson's (Felix Dean). While he would make an enemy of Gina Austin (Sonia Todd), the principal of Summer Bay High.