In one of the light novels called El Dorado Covered With Clouds (in which El Dorado is actually a planet, not the MacDougall's ship confusingly), at one point Aisha was shot several times through the stomach by a laser rifle. As mentioned above, this shows that Ctarl-Ctarl skin is weak against lasers, but Aisha also got up a few short minutes after this, seemingly unscathed. In that same novel, the Ctarl-Ctarls' remarkable regenerative ability was likened to a battle droid; "the only sure way to make sure they're dead is to remove or destroy the head". Jim Hawking also said something similar in the sixteenth episode when Aisha fought Lady Iraga. He commented that even a Ctarl-Ctarl is history if their head got smashed in. Why am I being reminded of zombies?