Cognitive: Insomnia by @Minzoku (Julie Miyamoto)

One more--and what's the difference between Emotive and Cognitive? The perceived source: emotions usually come from an external force, such as love/hate for another person, while cognition is usually mental activity.

For purposes of the bestiary, Emotive types generate feelings that most people can control on their own [anger, loneliness], while Cognitive types generate sensations that aren't normally willed away [sleeplessness, nausea].

This one is pretty vicious, as I can personally attest... =p