Geraldine Diamond
From Tardis Wiki, the free Doctor Who reference
COLT-5000 was a bounty hunter hired to find and kill Jenny.
Arriving at the Vesh Taralesh Emporium, she killed Vesh Taralesh when she refused to divulge information on Jenny's location. She made a deal with Garundel so that she could track Jenny across time and space, as long as she spared Garundel's life. (AUDIO: Stolen Goods)
COLT-5000 later tracked Jenny to Kamshassa. (AUDIO: Neon Reign)