The town's female judge and romantic interest for BraveStarr. The two shared a kiss in "BraveStarr the Legend." She came to BraveStarr's aid from time to time, using a high-tech gavel given to her by the Prairie People (referred to as a "hammer" in the series) as a weapon. Her Scottish father Angus McBride was an ex-prospector; he ran the town's newspaper after being crippled by his former mining partner Tex Hex.Diane Keener
- Episode 01: Tunnel of Terror -
- Episode 03: The Day the Town was Taken -
- Episode 05: Kerium Fever - Judge J.B. was kidnapped by two 'Prairie People' (actually robot replicas made by Tex Hex) and taken to the Hexagon. She managed to escape on her own accord and stole one of Tex's Turbo-Mules, taking one of the robots with her as evidence. She presented it as proof of Tex Hex's involvement at the Prairie People Settlement to stop a fight from breaking out.
- Episode 12: Big Thirty and Little Wimble - J.B. took her father into the Far Desert to get some pictures for his newspaper, but after they were attacked by Howler and his Leaper Riders and rescued by BraveStarr, Thirty/Thirty and members of the Forgotten Tribe of Prairie People, quickly returned with her father to Fort Kerium.
- Episode 07: No Drums, No Trumpets (mentioned only) - BraveStarr mentioned that J.B. signed the papers to make Paco the sole owner of Peaceful Valley.
- Episode 25: Wild Child - Judge J.B. was the first to befriend Wild Child by tending his wounds and convincing him to trust the Law-givers into bringing him back to the Dingoes. After entering the Lost City, she was the second to be captured by Zarko the Hunter and disappear.
- Episode 47: The Price (None speaking role) - J.B. was among the mourners when the lifeless body of Jay Olman was taken away.
- Episode 65: Strength of the Bear - J.B. followed Thirty/Thirty into the Badlands to help Bravestarr riding her Turbo-Stallion.