[@savato] sensible nothing. Cyano did make a radical decision yes, but even sensible decisions are thought out. Speaking of which, I need to make an outward NPC post.

Looking at it as an outside observer, Cyanos body is empty and vulnerable, and nova has planet wide psionic sensing. Therefore he could sense the link between Cyano and Escher, and also sense that Cyano has no hostility towards him unless he has hostility towards her. Depending on how good it is, he could possibly be able to tell that Cyanos side is literally the only side that, while not with him, is also not against him in any capacity. 

And then the matter of ruiko. Suffice to say, she's not strong enough to take on Escher. Even if she was, why would she help a random alien that came up and said "hey, I'll let you kill your ex best friend if you come with me. Here, try not to die from these giant ape like aliens"