He's a little disheartened by 2B turning down his offer, but he understand why she would. She had her own duties to perform, and any assignments given by the humans should get their utmost attention. He just wishes they had been given the same duty. With her on cleaning, and him on community guard, that means they aren't partners anymore...

9S doesn't realize it until he catches 2B's signing out of the corner of his vision, but he was looking down at his feet. He raises his head quickly, out of respect and to feign attention.

Right! Of course... Well, considering how the Sound Eaters seem to operate, it's probably better if I don't.