Johnathon's Crest part is an item obtained during Family Crest. Each part of the crest is owned by one of three Fitzharmon brothers, who have all left their family home. Each brother took a separate piece of the crest with him to prevent the other two brothers from inheriting the family fortune.
Each brother requires a certain task to be completed before he will give up his third of the crest. Johnathon requests the defeat of the demon Chronozon in Edgeville Dungeon.