Pick a trait to see what story content it opens. Solo content is gated on that trait alone, and nothing else in the game satisfies it. Shared content comes through a cluster the trait belongs to, where any member qualifies, so it is only worth something if the character has none of the others.
Choose a trait on the left.
Each event counts once, even when a trait reaches it through two clusters. For a trait's ratings, opinions and effects, see Traits.