Previously, it was called "No, You Won't", and functioned as an instant nullification of any other powers that might possibly be in effect in my vicinity. As per being the type of realist that's actually a pessimist who never really believes anything will work out.
Now, as per some... circumstances, my superpower is giggling like a stupid chipmunk at stupid things and feeling oddly content and happy when I shouldn't. Actually, I probably should, since she's the best thing ever to happen to me.
It possibly projects, but more likely makes people think I'm somewhat simple in the head.