Oh look! Parts of him are glowing without the aid of technology. Keep a 10 meter up at all times and for the love of whatever you pray to don't touch it.
Bio-luminescence isn't all that odd of an evolutionary adaptation, though it would be exceptionally surprising if it were a naturally evolved trait, rather than something spliced into the genetic makeup.
Since his mouth was glowing on the cover for this chapter. . . something tells me he has mouth lasers. . . or fire breath. If either of these are true, and with no cybernetics (I assume), that's one dangerous, downright scary race to deal with.
Dunno about guns, but I reckon that making his/her mass heavier would push him/her trough the floor - That would be a quick way to get away from him/her.