Kara tries not to sigh as she rises. "Unfortunately Ms. Livzi, every moment you're around us is another chance for your body to be colonized by some pathogen everyone on Coruscant became immune to a thousand years ago. Exposing a native to a spacefarer's microbiome used to be a popular way of wiping out entire planets. You'll need an immune-booster immediately. The only reason I didn't acquire you one immediately is I wasn't convinced you were telling the truth." She catches Kaden frowning at her out of the corner of her eye as they began heading towards the medical lab. Probably "galactic genocide" was not on the list of Jedi approved conversation topics.
Normally, they'd have to head somewhere specialized, but Kara had spent the last few years looking for people unlawfully taken from backwater planets; which meant she had everything on hand down in the med bay. She keeps to herself on the way down, letting Kaden regurgitate more Republican propaganda as they walk. Sarah nods along, looking up at him with wide eyed adoration, which, given what Kara has seen of the girl, is almost certainly fake. A part of her had idly wondered if it would be kinder to simply let the girl go and become a Padawan, but Kara suspects that the girl would fall to the dark side on her first day, and god help anyone who was nearby.
The med bay is more or less empty today. It's nothing fancy; just a few cots, used about as often for officers who need a nap for serious injuries. There is a nurse droid, IS-TN, some humanoid model with glossy grey plating, who Kara hasn't really bothered to get to know. Kara more or less ignores her. They seat Sarah in a substantial chair, hook up some monitors, and get started. Kara installs an immune-booster, a typically painful process, and somehow Kara gets the sense that Sarah deliberately generates a wince fake enough to elicit a sympathetic pat from Kaden and yet not quite realistic enough to fool Kara.
Maybe a day was generous. This girl would fall to the dark side in an hour.
Then comes the tricky part. Maybe Kaden forgot about getting the girl's m-count, but Kara can't risk him doing the test on his own. She grabs a reader, and while her back is to the other two, pricks herself with the needle of a second one. She palms the test showing her m-count, keeping her hand slightly behind her body. Angling the display on the fresh test away from Kaden, takes a drop of the girl's blood. The reading lights up in green block letters, causing Kara to stiffen in surprise, but at least she won't have to do the swap. Which is good, because she really wasn't sure she was good enough to get away with lying to a Jedi Knight.
She angles the reader towards Kaden, showing him the reader, and he gives Sarah a roguishly sympathetic smile. "Sorry sweetheart, 985. Looks like you'll be staying with Kara here instead of coming back to the temple with me."
Kara stays quiet as she packs up the test, trying to figure out the implications of that reading. It's not that 985 was unheard of in humans, though it was maybe three standard deviations lower than the median.
It's just 985 was as low as the meter was built to register.