Can Laphicet sense malevolence in your character?: Sort... of? Catherine doesn't really have any malevolence to sense. If she has any strong negative feelings described in my tags and you think he can sense an android's feelings, go for it (I don't mind!), but she's an extremely nice, altruistic person who doesn't dwell on negative things. There's maybe some hidden grief over, uh, the apocalypse, but she deals with it pretty well. She's shockingly well-adjusted.
If yes, what kind of negative emotions can he sense? How severe are these emotions?: See above?