Fortunately(?), 9S doesn't have many feathers elsewhere. All of them appear to be sprouting from beneath his hair. At first, 9S tracks Tyki's movements with his eyes, but eventually doesn't bother when Tyki circles around behind him.

"Er, it's the same thing, isn't it?" Nevertheless, he tries out the less familiar phrase. "I'm modelled after the humans who made me."

Hm.

"I suppose it does sound less official..." And he's leaving YoRHa behind, so... Well, using the new phrase would make Tyki happier than if he stuck with the old YoRHa ways. 9S kicks idly at the ground. Or... well, as he can in his heels. "How do humans find worth in their lives, anyway?"