Does it mean there's an option to use it with her usual(or other) outfits? What of the story scenes?
I don't understand what you mean with the first question. But no, story scenes can only ever use one outfit, which will usually be their default outfit. If this were a fully 3D rendered game, I would love to do that. But doing that in a CG image game would bloat the filesize enormously and cause each update to take a very long time to develop.