Oliv has black tentacles with red eyes in his use and can make his whole body look like it. If you join him he will wrap them around polus to end all the crewmates as you join him In it. If you refuse... he will hunt you down to kill you just like the crewmates, beware he can shape shift. There is no room for traitors. Earth sends guards to polus to save the crewmates. So kill them too or escape with them. Go with your genes or burn them.