They sense hearts. That's how they know what worlds have life on them and what don't. Your heart didn't cause the destruction, but it may have helped lead to it.

[As Equius emphasizes the threat behind his words to Deior, Asuka starts shaking his head. And doesn't stop.]

Not a good idea. People get punished here just for fighting each other--you go attacking the guy in charge and I wouldn't be surprised if they blast you right out through the walls. Just calm down. Beating the shit out of him's probably just going to make him work slower, you know.

[Also, Asuka's only taking one thing from that whole blood thing.]

...who ever heard of violet blood? That's just weird.