I was thinking, considering her drawing skill and her and ability to visualize distances pretty accurately(to the point of savantism even), wouldn't Katia make a pretty good cartographer, architect, or land surveyor? Those are pretty well-paying professions.
EDIT: Further musings: Given that Katia, upon consuming even a small amount of alcohol will result in such things as, in order, the pineapple/yo-yo trick, a night with an orc highwayman, and another night involving a threesome with a necromancer and a skeleton(and an "amulet of silence"), along with the fact she suffers terrible nightmares if she abstains, could it be that Katia is being influenced by Sanguine?
It follows the method the Dragonborn acquires the Rose in Skyrim: gets drunk(with an avatar of Sanguine), proposes(successfully) to a Hagraven, steals a goat to pay for the ring, then somehow ends up on the opposite side of Skyrim in a temple of Dibella having passed out after molesting the statues(in the DB's defense, given that it's Dibella, they could be very molestable statues). When you manage to work your way backwards to the Daedric Prince of fratboys, he even admits that he doesn't really think these sort of things through.
It actually makes it pretty funny if Katia is really the Hero of Kvatch. Mehrunes Dagon, the Prince of Destruction, is beaten by a drunk cat empowered by the Daedric Prince of Dude Where's My Car?. It makes it even better(and logical) because Martin Septim was in fact a worshiper of Sanguine. He reveals this if you use the Rose for his ritual - he once owned it, suggesting he was deep in Sanguine's favor. That actually makes Oblivion not a fight between Mehrunes Dagon and Akatosh, but a fight between Mehrunes Dagon and Sanguine. Sanguine steps up when Dagon threatens one of his best broboys: Martin.
...Damn it, now I want to reinstall Oblivion again.