User blog comment:LadyAlys/Skills Rebalancing and Other Changes/@comment-25188311-20150501224402/@comment-24150802-20150501225047

Another good question. No, the only damage from negative Habits is that which the player themself receives as soon as they click the Habit. The boss doesn't get involved. I'll update this blog post. (Interesting idea though. My party mates would REALLY loathe my nail biting habit!)