Traits are quirks associated with specific races. Unlike dispositions, non-player characters do not randomly spawn with a trait.
For example, Cryptling have a trait which causes them to become empowered by elemental damage that matches their element. 
For a list of known traits, please see Category:Traits
CohhCarnage Hosted Gameplay - August 2021 Example of a trait @ 1:05:58
CohhCarnage Hosted Gameplay - August 2021 Description given @ 1:08:32