He continues smiling serenely through the knuckle-cracking, because it's par for the course. But then, really shocked, and looking hurt on L-sama's behalf he exclaims, "Oh, no! Your Lord Grandmother may end someone's term of service, but She doesn't kill love, Gaav-dono." And if Gaav decides to hit him or something for sounding reproachful, well, he doesn't deserve to be hit for this, and the enormity of Gaav's astral body should mask his enough for it to be safe to dodge. He doesn't have his back turned this time, or anyone to sledgehammer over the head with the illusion of his frailty.
Shrugging, "As for how young, that is... something I don't know." His attention's always been more on the adult dragons. The yellow ones. The yellow and drippy ones, for preference. "He's this tall." He measures a height off with his hand that looks a lot more reasonable up against his own short-even-for-an-Asian-guy height than Gaav's absurd proportions. "And his memory is in advance of his brain's development, and that's why I say it would be good to be a little more gentle than usual with him, Gaav-dono. Because he isn't mazoku, now. Not even a little. The same thing feels different, from one species to another, let alone from one age to another. It's not just experience. The body changes how the heart feels the world."
He grimaces, and rocks back on his heels into the relaxed stance (minus the staff, which he misses right now) that he's always taken when reporting progress on The Phibrizzo Problem to Gaav (who, not being his own lord, is entitled to courtesy but not formality). "So far my resources have been limited; I have nothing like the kind of raw material handy to weave into the kind of trap that took him down before." He pauses. "Well, at least, not with the same freedom of use. Lina-san had the protection of innocence as well as ignorance. Up to this point, I've been limited to souring the astral field for his particular tastes and thinning out his natural population of multifaceted eyes." Meaning, killing off the insect population, which he habitually uses as a spy base.