The Alpha's Last Mate

Alpha Monroe is a royal werewolf who watches as his father Gets devoured together with his entire wolf pack by a deadly Demon as he gets casted into another Dimension by his dying father, he needs to find his mate who would teach him how to use and control his powers to defeat the demon that now lurks the world in different forms to get him... He finds a best friend, but little did he know that she also carries an ancestral royal blood too.

Could they be mates?

Or could she be the Demon.