The knowledge gained here could make or break the rebellion. Guard most defining features are the ability of their hug's to heal, sugar induced candy crazes, and a disgustingly cute appearance. Let's see how the Guards match up to these characteristics. Borrow a few chains from Dilligaf's swords in for some "completely humane" Guards testing. What's the worst that can happen?
News hero. Looks like the Guard no longer want to free themselves from Kazeth oppression. Instead, they are dead set on destroying Kazeth entire empire! All this because one of the Guards you captured and I killed in testing was their leader. Good going hero, you just had to imprison royalty. Some Guards peasant wasn't enough for you.