The lord of the flies Simon
In this book, Simon appears as a thin, weak and shy figure in the beginning. But as the story progresses we find that he actually has an inner strength.
Simon's intelligence is different from Piggy's who is scientific and rational. Simon is a symbol of truth and kindness, while Piggy represents civilised knowledge.
Simon is very smart. He has an extraordinary insight for the boys' real ideas in their heart and dares to explore the truth of the beast. He treats the younger children kindly and make friends with a chameleon. Other children have a social life but he prefers to stay alone and contemplate.
If Ralph represents civilization, Jack represents the brutal, Simon seems to represents the innate goodness of human nature. This goodness is intertwined with the nature, as well as Jack's evilness, kindness also is the fundamental nature of human beings.
When the civilization doesn't have the restrained force for children, all the children on the island, just Simon do things accordance with the moral standards.
In the end of the story, Simon died in the hands of his friends because he has been companions as a beast. This also reflects the goodness is how vulnerable in front of the evil.
Until here, I believe Simon is not just a weak and shy boy in your heart now. Instead, he is a reverend man for bring kindness and hope to this world.