[ It is a universal fact that no one (not even bona fide grumpy old men Head Captain Yamamoto) can pull off 'playful grumpy old man' like Yoruichi. Kisuke might has a bias, but he'll deny it. ]

Ahhh, that is my Princess - always finding the proverbial loophole.

[ And he of course is entirely innocent of such things. ]

It does practically beg for someone to snoop around doesn't it?