Isaac is the main hero in the Golden Sun GBA game.
Histroy
During a dangerous storm over Vale, Isaac was in need to help his family and his best friend Garet to take shelter from a big boulder that was coming down from Mount Adept, When they where heading for the plaza they found out that thier firend Felix had fallen into the river and was in need for help, so they and his sister Jenna went to the plaza to find help. When they were ready to help Felix, the big boulder came down on top of Felix, Jenna´s parents and Isaac´s father Kyle.