A long shot, but absolutely anyone else from Alive: The Final Evolution. Which is a manga that contains a lot of suicide and also super powers. Nobody of the many very interesting characters is completely good or evil and it's a really really good manga. There's also only 82 chapters so it's not the longest read. (And the one that drew it also draws Noragami.)


So yeah I'd really want any cast mate to D2, but if I'd have to name a few in particular it'd be Yura, Aoi, Rei, D4, McPherson, and the professor?