Jack was kind of innocent at the beginning of the book (when he arrived at the island) He was innocent at this point because he had not killed or even tried to kill anyone or anything.
Piggy being scared.
I wanna go home to my auntie!
Jack starting to lose his innocence by hunting and killing a pig with his group of hunters. He started to loose his innocence at this point because he had hunted and brutally killed another living animal at this point in the book.
Ralph being scared
Jack lost all innocence when he had and started to hunt ralph. This made him loose all his innocence because not only has he now killed a bunch of pigs he is also hunting another human with the intention to kill.
Simon being scared.
OH NO THE LOTF
Piggy is scared about being on an island without any adults or easy access to daily necessities. This shows the theme because piggy was really scared and wanted to go home and be safe.
Ralph is scared because he is being hunted. This shows the theme because ralph was scared about being on an island without any adults and with no one he knows.
Simon Is scared of the beast. This shows fear because simon had a hallucination about the Lord of The Flies and even before that he was scared of the beast and he now has even more to worry about.