GM Uktar wrote:You're right. Nigel's never tried "blind ninja bodyguard" before, but I know being invisible means you don't provoke AoOs from opponents that can't pinpoint you. I just didn't link that up with Bodyguard. Thanks for pointing that out.
Per the Combat section of PRD/CRB:
"You can't execute an attack of opportunity against an opponent with total concealment, even if you know what square or squares the opponent occupies."
No AoO means no Bodyguard, i.e. Nigel can't help AC when blinded/eyes closed/v invisible foe.
Not that it mattered this past round, but FYI.
No worries. Got a helpful halfling that likes to use Bodyguard feat for pals... when he's not Glitterdusted!