I thought about Diplomacy, especially given how high Giley's CHA is, but with the limited skill points for a sorcerer and the fact this is, as I understand it, a modified dungeon crawl, I really couldn't justify using the piddling skill points I had on a skill that probably wouldn't see any use. It does into his background, though, in that he's been isolated with dryads his whole life and thus while he's naturally charming, he hasn't been able to cultivate that in any specific direction.