I don't understand who Fortinbras is. What is his role?

WEll, you have come to the right place! Fortinbras is the young Nephew to the King of Norway. He is a hot head and is royally angry all the time. He wants the land lost from his late father back from Scotland. He is also a foil to Hamlet. Hamlet really wants to be like Fortinbras, all angry and soldiery. You will see this as the play unfolds!