When it comes to new pokémon, as a separate tip, you may wish to introduce this abra to them in the same way you would with any skittish pokémon: slowly, in a comfortable environment, and individually or alongside pokémon she’s already comfortable with. You may also wish to introduce her to the other handlers in the same manner, for that matter, as that may help minimize her tendency to make such a jump to you, as opposed to anyone else in the immediate area.
Beyond that, you’ll need to work on her confidence. That is to say … train her. It may be challenging due to the fact that most abra start off knowing only Teleport, but if you’re creative with using just that, you may help her gain enough battle experience to accept moves taught to her via the TM/HM system, move tutoring system, or even by herself after evolution. The stronger you can get her, the more confident in herself and her abilities she may become, which in turn will help her feel less scared of her surroundings.
However, that’s not enough. If you only do that, you’ll simply arm a scared pokémon, rather than teach her how to be comfortable with everything around her as well as herself. If her surroundings aren’t comfortable enough for her, you’ll need to figure out what could be improved. Perhaps it’s not the right temperature, or maybe she doesn’t have enough bedding. Maybe she needs a few adjustments to her diet.
Once you figure out the right balance for her surroundings, train her to be comfortable. If it helps, try this method: have her touch your hand, either with her nose or her psychic abilities. Then, feed her a treat. Do this a few times until she understands that touching things leads to a treat…
…and then introduce the rest of the shelter in this method.
Now, when I say “the rest of the shelter,” I actually do mean that, so this may be a time-consuming thing that can’t be done in a single day. Start with your coworkers and inanimate objects (cleaning supplies, dishes, anything that could be dropped or that might make a startling noise). Have her touch or interact with each, and when she does so in a positive way, give her a treat. When she feels comfortable with that, move on to the other pokémon in the shelter. Do this even if she feels comfortable with them already. Eventually, she should begin to associate each person, object, and pokémon in her immediate surroundings with a positive experience, and that, in conjunction with the confidence fostered by the battling, should help her grow less scared of her surroundings and thus less likely to be startled by them. Once that happens, you should notice a sharp decrease in teleportations.
Best of luck!