Junior Agent Astrid Farnsworth was assigned to the FBI's Fringe Division as Agent Olivia Dunham's assistant. Soon after, her job required her to assist Dr. Walter Bishop in his lab while investigating and researching Fringe cases. Astrid may be a junior agent, but her impressive background makes her an essential addition to the Fringe division. She majored in Linguistics, minored in Computer Science, and studied cryptology all before joining the FBI. Astrid also speaks five languages.

Astrid's extensive background has helped the team solve cases from interpreting Latin to helping reprogram homing pigeons to fit them with GPS receivers. She also has the thankless job of looking after, cleaning after, and often feeding Walter Bishop who finds it nearly impossible to remember Farnsworth's first name.