@MasterJay That's interesting, though not something I haven't seen before. Well, not really. I mean.... uh... nihil sub sole novum.

It is possible that the Precipice and the medical staff aboard the Precipice could reprogram the Flora / Human hybrid to make Aryan the dominant mind, and make the Flora unable to cause a mass outbreak aboard the ship. The medical tech onboard here cannot revive the living or cure the symptoms and end results of old age. That's the only limit I put here. 

Other than that, nice stuff. No real weaknesses, though. I don't want to imagine what happens if everyone gets into a character power arms race. The Flora should have a weakness, I think. Something that's real and dangerous, but unable to be utilised by the poor people who died to it quickly enough.

(Hell, I even considered allowing individuals that caught the zombie plague and turned to regain their sentience if they were brought on board, but it seems like it would be illogical with Crank's CS. Since Raven's mother was left to die.)

EDIT: Forgot something. Added it in.