Complex sentence: Korra and her friends are supported by Iroh (Dante Basco, the voice actor of Zuko in the original series), a firebender and General of the "United Forces": described as "a swashbuckling hero-type guy".
Split into simpler sentences: Korra and her friends are supported by Iroh (Dante Basco, the voice actor of Zuko in the original series), a firebender and General of the "United Forces". He is described as "a swashbuckling hero-type guy".