Agents traits and retinues

[Malrubius]

Yes, there is a Paranoid trait for family members. Attempting to assassinate them, even if the assassin fails, causes the enemy generals to pick up all sorts of bad traits.

That's from vanilla RTW.

One good thing about the traits is that, so far (knock on wood), I have found no hard-coded limits on how many traits can be created, and EB has a few new ones. The possible things that can be done with traits seem to pretty much be limited by the availability of events or conditions to tie them to, and your own imagination.