WE'RE TOO COOL NOT TO WEAR THEM (seriously, they leave them on him in the *morgue*, he really is too cool to be seen without them.)

Normally he'd be uneasy about working with someone else, but seeing as there really is no apparent way for Greed to hurt him, if there's a benefit in it for him he'll be happy to do some recon or some crap like that.

No worries! Work is work, I know how it goes.