"Young and brash, Theor comes from a long line of skilled warriors. After traveling for a few years he has moved back to the city hearing a band of bandits had raided his village. He is now seeking allies to exact revenge on the bandits."
Theor is a Fighter unlocked at the start of the game. After repairing the Town Hall he is one of the four starting heroes. Investing in the Training Hall will grant him experience points and will also boost his power temporarily. Leveling up the Training Hall increases his level cap. Theor maxes out at level 30.
As you raise your heroes' levels you will be able to send them out on personal quests, earning you exp, gems, and some background story on the character.