At Some point in their past Holly and Jetta became friends. I believe it was this moment.

If Holly knew she was saving an Exterminator agent she'd probably jumped in the molten metal herself.

The story behind this
After Keri had finished her interrogation of Jetta, she instructed Bulloni to dispose of her at the Metal works.
Holly on the a hunt, saw what was about to happen, and swooped in to save an innocent. A vicious battle ensued. Both Holly and Bull took some heavy damage, but Holly managed to drive Bull away. Holly found that Jetta was in much worse shape, and was on the verge of perishing. Without thinking Holly used an ancient Vamperic ability, taught to her by Retsam, used to heal themselves and or their faithful minions.
Jetta awoke, she was in extreme pain. The last thing she remembered was being dragged towards a smelter by Bull. And now she was resting along the protected side of the Sector 8 security wall. She turned her head towards a beeping noise. Jetta could barely make out a figure in the shadows of one of the wall supports. Jetta managed to cough out "Who are you?"
There was about a minute of silence before a reply came. "Hmmm?, A guardian angel I guess."
Then my Guardian Angel, could you move from the shadows so I can see you?, Jetta replied back.
"I can, but you will not like what you see." the voice sighed.
The figure ponced from the shadows. Jettas heart filled with terror as the creature Rellik hunted with a vengeance, and was also every Exterminators nightmare, landed and kneeled just out of arms length next to her. Jetta let out a loud painful yip as she back paddled along the wall to get away from Holly.
Holly smirked and waited till Jetta had backed into a wall support. "Don't worry, I saved you to save you. NOT to feed upon. I and the clan I belong to only prey on those who prey on the innocent, and those who would hunt us."
Holly turned away. Off in the distance she could hear a siren. She looked back at Jetta. "Well I gota fly now, oh and here's your com pad back." Holly tossed the small unit at Jetta, who was still in fear of her life. She watched as Holly bounded up and over the security wall back into sector 8.
Jetta reached for and snatched the com pad up. The emergency services GPS had been activated and there was a text message.
The message read "You owe me"
Jetta sighed in relief as an Emergency Services vehicle came around the corner. She was also thankful that there was nothing on her furson that showed she was an Ex agent. Her only worry now was how she was going to explain her condition, and this time she couldn't blame it on Lt. Anika.

Sorry for the lousey story its rough, but ya get the idea ;)
Thanks for looking

Her encounter with Keri http://www.furaffinity.net/view/422059/