Complex sentence: Though he has a kind looking demeanor, he was once a ninja that was revered as much as Hanzo Hattori, but he is forced to leave the clan after Hanzo defeats him in a duel.
Split into simpler sentences: Though he has a kind looking demeanor, he was once a ninja that was revered as much as Hanzo Hattori. He was forced to leave the clan after Hanzo defeats him in a duel.