Vigil, from Ultima V: Lazarus
When the Avatar met her, Vigil spoke about how she'd been a warrior, before retiring to the peaceful life of a farmer, and that they'd learned much. She mentioned the Shadowlords as an afterthought but didn't go into details.
Since the Avatar was told of her role in the local Resistance cell, the hero told her the password. Vigil remained mistrustful, and the Avatar couldn't give her ultimate proof. However, admitting so made Vigil impressed by such Honesty and she said that her friends Joshua, Leof, and Thentis have interesting information.