Christophe is a beautiful, chic and elegant name, like some other names in French, I think "Christophe" is a very becoming, sassy and sexy name for women.
This name is quite outdated in France. It was really, really popular in the 60's and 70's, but not very common anymore. I prefer the English version, Christopher :) And poster above- this name is not feminine. It would sound very strange on a woman, don't you think? It would be like naming your daughter Christopher.