Much of the third act of revolves around the collection of allies in the fight against the Absolute, andthe Harpers stand out early as a potential group to team up with.
Players can already have Jaheira, the high Harper of Baldur's Gate, on their team by the start of the act, and more like Harper Geraldus can be found throughout Rivington and the lower city.
But there is one Harper that nobody can recruit, and in fact, many players will end up killing them without ever knowing.
This particular Harper is named Archer Velicia and is undercover in Rivington when the party meets her. Only through a certain spell can this double agent's true allegiances ever be learned, but by then, any alliance with her will be more than forfeit.
Archer Velicia is undercover in the Guild, an organized crime syndicate that connects the different thieves, thugs, and murderers in Baldur's Gate.