That's the nice thing about Iuliael. Not the strongest or sometimes the brightest, but he cares, and just that is enough to make Joker smile slightly. It falters a little bit at the offer, because he's really not sure if someone like-

...Oh. Hm.

"It's a bit embarrassin' ta ask, since it's rather what I was made for," he starts off, slow, "but... I can't be everywhere at once, which is a problem when I have demons ta take care of and a charge ta watch. If ya wanted, could ya make sure he doesn't get inta too much trouble...? Just watch over him and such, with emphasis on 'watch'."