Well, she was born deaf. Apparently almost all white cats are. She is not remotely jumpy actually, she is very affectionate and very calm, which is what I needed really as I am quite an anxious and naturally stressed person. She took no adjustment time at all. She was sleeping on my beanbag or on the floor next to me within a few hours of bringing her home. I thought after 3 years with her old owner, she would take time to adapt but nope. I am guessing she uses her other senses more. They do say cats are intuitive anyway.
She will be an indoor cat as I live in an apartment/flat. I do have a back yard that is totally enclosed by a high wall but I doubt I will have that when I move into a council property later this year. I would not want to risk letting her out anywhere near roads. She seems content enough being indoors to be honest. Has not even jumped on a sill to look out the window.
I hope she stays calm.
My Ex and I had a black-and-white cat called Eliot (after Thomas Stearnes Eliot) who forcibly adopted us, when he was just a kitten. We could tell that he had been well-looked-after by somebody, so we tried to trace the owner, on the asumption he was lost. Only one person responded to our ads. She said "Sorry , that isn't my cat...but he is a very nice cat...". We said "Hmm. Sorry, we can't let him go. We really ought to continue trying to find the real owner. " All this time, Eliot was mooching about the house, being extremely well behaved for a kitten. We assumed he was pining.
Shortly after that girl visited, we agreed that we'd better face up to the fact that Eliot was well and truly lost. Maybe his owner had died? I didn't really want to take on another cat (We already had two, both foundlings, and as a veggie, I'd really rather not feed carnivorous animals) but Eliot had totally infiltrated our hearts by this time, so we both said. "Oh, alright, he can stay"
Eliot was lounging about on the sofa, half-asleep when he heard those words. Instantly, his ears pricked up, he leapt to his feet, and did a mad full-pelt circuit of the house, knocking things flying as he passed; then he ran straight up the tapestry wall-hanging, as if it were a tree. His pining days were over for good.
Of course, you've already decided to let Christine stay. So maybe this won't happen to you.