Oh it's not that unncommon. (I've just read the story in which her name is chaged at least six times and it is not finished yet AND it still easy to follow). It depends on you, the author, not the name changes

Use her name of the moment. Wouldn't it be even more confusing if you were using one name and the other characters some other?

That is, unless you are after some other effect?

Have fun

Pej