Despite his youth, Zuko has demonstrated great agility and strength. His chief education in this is derived from his uncle Iroh; flashbacks reveal that Zuko's skills were subpar as a preteen, but that they improved dramatically under Iroh's tutelage. He is twice shown to be a match in combat to his sister Azula, although he lacks the emotional discipline to generate lightning. He is depicted throughout the series as both powerful and skillful in both martial and aesthetic applications of firebending.