Look, it is the cruelest thing I can say, but you should really try to scrap (or reuse any asset that the woman didn't do) what you had and change the name.
While you are a team of talented people, it's sadly impossible to take out CorpseSyndrome out of this game without changing practically EVERYTHING. The art, the original characters. By the point you are finished, you will only have a Mario without personality because even that can be traced to her.
Again, I know that you are talented and you might probably not want to make all your work useless. But it's the best course of action if you don't want to drown in her tainted influence.