There is a ghost in the ghost quest that is often overlooked, despite walking past it several times. It’s mostly hidden behind a tree (and easy to spot if the tree is gone or young), and almost completely obscured by cherry trees.
Go to Hackfast Quicks. Go to the shrine, then go right until you get to the first tree to the right of the shrine. Look above the tree; you may just see a head peeking out if your ghost is there.