Who is Fezzik from The Princess Bride and what is their importance?

Fezzik is a Turk. He is a giant but the most gentle giant that ever existed. Fezzik's simple mind is not naturally inclined to violence. Instead, Fezzik enjoys rhymes and is delighted that Inigo encourages this habit rather than laugh at Fezzik. Fezzik does not lead but is a natural follower. He does tend to question some of the instructions given to him by Vizzini but rarely deviates from a specific plan. The few times when Fezzik acts without being told what to do, he is either angry or distracted and events unfurl without his knowledge.