Zuko is 16 years old. Zuko is Prince Ozai's son. Despite his youth, Zuko is highly skilled in Firebending.Zuko has also shown to be highly skilled in the use of the double broadswords, a talent he refined during his time at sea. In "The Blue Spirit", Zuko succeeds against a number of adversaries with nothing but his sword skill. Zuko can also firebend while wielding swords.