Both laughs are scary (I' love that kind of laugh. I drove my friends nuts by the occasianal mad laughter) but they are a bit different. Naga is more of a maniacal, self important laugh and Jinnai is more of a truly mad laugh, like he's a few marbles short. I'm leaning towards Jinnai. My first impression of his laugh was more of a 0_o than Naga's.