He couldn't focus, he was fidgety, and between the two that tended to make him fussy and worried. Not that anything had happened to Grell, no, he was quite certain she could take care of herself. After all, it was hard to keep up a fight against Marco especially if someone didn't use haki -- though soul reaper abilities probably qualified as such -- yet Grell could always hold her own if not completely get the better of him.

If anything, he was more worried she'd be the one to go crazy axe-murderer on someone. Sorry, chainsaw-murderer.

Still, his worry this time was that she was waiting for him to realize that it was an open invitation he was missing out on and the more time he wasted wondering the more likely it was that she was going to get mad at him for not picking up on her subtle seductions and then make him pay in spades for it.