Jacob is Ben's best friend.We'll he's also Matt's best friend. The three live in treehouse in the outskirts of Shootstar City. Jacob has grown a lot faster than the other two boys and is a deep thinker, always thinking tactically about the next move and how to look after his two friends. However his body has not caught up to mind and he quietly he resents how goofy, clumsy and lanky he is. Still he is a very talented handyman, fixing things around the treehouse and working as a repairman in the city, very talented with twin wrenches. But when the world began to fall to the Dusk, Jacob stood by the Princess and his best friends as one of her "Starlight Knights" exchanging the wrenches for twin-daggers and learning how to channel his starlight into the elements of fire and earth elemental mastery, where he becomes a deadly hot-headed beast on the battlefield, protecting his friends and winning the offensive with burning resolve.