Piratecat said:Thanks so much for the thoughts. I think that I'm going to go with the reoccurring viewpoint here: if the creature is a specific being, he isn't obligated to go.
Next question: can he send an underling through the gate instead in his place?
Here's a thought ...
For my campaign world, where I want truenames to play some part in the stories, I added some feats to reflect this. All Outsiders know their own Truenames.
Named : The mortal knows its truename
Nameless: The mortal does not know its truename
Namer: Allows a divine spellcaster to help a mortal discover its truename
and the important one for this discussion:
Name-Debt : An Outsider owes you a name-debt, and must respond in your place if you are summoned or called, or must otherwise perform a service to repay that debt. This feat may be gained more than once, and the benefits stack.
Name-Debts are used, in my campaign, as a "currency" among the Outsiders. The feat is a temporary one, bestowed by one Outsider on another as payment for services, etc., and is removed once used. Valuation is based on what the Encounter Level would be for the combination of creatures of the Challenge Rating. i.e., the Name-debts of 2 CR3 creatures can be traded as equal value to 1 CR5 creature's name-debt.
There's a lot of room for fun in that situation. However, this is something that a Knowledge (the planes) check of relatively low DC (15) would reveal. If you were to add this to the existing situation, I think I'd give all characters with ranks in Knowledge (the planes) a check, and just about any creature with a strong planar background would likely know this.