Klaus' fear is going to (obviously) be ghosts and dead people. What kind of dead people and ghosts would he see in Hadriel? Anything specific, or a specific kind of people or a common type of death, any common threads, or is it just up to me?

For ghosts that he sees that are tied to people (eg. he tends to see ghosts of people that were murdered by the living people around him) I imagine that would be up to player plotting?