Diarmid

Diarmid is one of Sarevok's underlings who is waiting for a group of mercenaries that were suppose to meet with Sarevok in the crypts below the Candlekeep Library.
He is encountered in the caves at the end of the catacombs, near the exit. He does not initially recognize you, believing the party to be the group of mercenaries, and thus can be freely questioned for information. Alternatively, you can tell him who you are.
Regardless of the dialogue options chosen, he will try to leave immediately after the conversation ends. This results in an update to the quest section of your journal:
==Gallery==
Diarmid BG1 Candlekeep Caves.png|Original BG image