[The mention of protecting her skin has Jetfire lift a hand up to - again - study her hand and lower arm with a thoughtful frown.]

It is rather easily breached, itsn't it? Terribly inefficient for protection... Ah.

[If she's particularly disturbed by Tumnus' new look, Jetfire doesn't show it.]

Non-organic. Reduced to ten feet, I am... or was, if you will, but merely changing physical shape, most probably temporarily, will not change one's nature, Cybertronian. Autonomous mechanoid. Something similar to a robot, if that's a concept and phrase you are familiar with.

[Yes, not even changing species like this stops pedantic explanations.]