/belatedly crashes in here
[While he knows of Sebastian via Nine White Orchids, and having met him, Zero has never really spoken much to him. Maybe just in part because their time at the shop doesn't always overlap. Regardless, he knows enough how the other doesn't shirk any tasks.
So really, Zero shouldn't be very surprised to see him doing as he is.]
. . .You really don't ever stop, do you.
[Wry, if anything. He's quite the workaholic and equally as lazy, himself, but being a hunter really doesn't apply in this place. At times he has no idea what he's supposed to do with such a great deal of free time.]