Beird is one of the two Black Ring guards at the Camp Eagle's Nest bunker in Orobas Fjords, the other being Abram. When you first meet them you choose to kill them, or allow them to surrender and become traders. He sells weapons and armor.
If you mindread Beird, he immediately lowers his prices and is found to be thinking about Olivia. If she has already been freed from her cage, he expresses disappointment that he can't "have her." If she is still caged, you can follow-up with questions, leading him to reveal the location of the cage key, which he threw out the window and is now outside on the beach under the bunker.