I think I've got it...
Varisian Stargazer Lunar oracle follower of Desna member of a clan that generally travels and makes a wide circuit from Ustalav to The Lost Coast.
Middle aged human, whose troupe made a stop to honor the Swallowtail Festival and new church in town. Would have been wandering the temple pre-attack and trying to assist getting those less than fit to the sanctuary during the assault. Could have seen the heroics put on by the party in standing up to the goblin horde.
Will try and do a full write up over the weekend if that sounds like it will fit in. Any suggestions for a tie-in would be appreciated? Since you spent some time by the temple before the attack, you may have noticed him earlier...