Complex sentence: As Diego he pretends to be lazy and clumsy, playing the role of a cowardly fool to hide his secret identity, but as Zorro he is the most noble-minded swordsman in the world.
Split into simpler sentences: As Diego he pretends to be lazy and clumsy, playing the role of a cowardly fool to hide his secret identity. As Zorro he is the most noble-minded swordsman in the world.