I have a feeling Negative and the butterfly(ies?) are, respectively, a 'curse', for lack of better term, and eyes-and-ears/lil' manipulators made by Hate, since it's pretty obvious the butterflies have something to do with Hate, or at least a Hate lackey, assuming she has those. And that scares me.
Or, on the more positive end, Rgb harnessed the power of/got effected by an attack from/worked for Hate, and Negative's just a setback of it he can overcome.
EDIT: Another one I realized the next day was he could just be bipolar, and Negative is The World of Make Believe's influence














