That was intense and I remembered that part in the dock.
Killy is looking for net genes which a normal human probably carries, that's what we at least can assume but is there such a person? Everyone saw how fucked up this world is, the chances are low.
Skivvies were introduced but I don't remember if they come back later. Anyway, Tettan and Yoshio were transporting some Skivvies that were captured/killed (?) by the order of the Corps. The governors are important, we still don't know how this world works but they apparently don't care about that level Killy is on.
Killy the Corps' men to avenge the Skivvies that tried to save them and to do justice. If you haven't noticed, Killy's design started to change and I think it looks a lot better as the story goes on.
Killy injected himself something (for the second time!), not sure what it is, though. The gun's name has been revealed, it's the gravitational beam emitter and that thing is insanely powerful. The gun is maybe connected to him and every shot exhausts him or Killy is just sick, his shaking hand can refer to both options.
Three guards or whatever appeared and reflected his shots (Killy had an adrenaline rush, looks like he enjoyed it). He lgoddamn lost to them and gets to the capitol.