I forgot to ask if the costume/mask can be something that they do technically own but was thrown together. Since Chireiden has a shit ton of really nice armor that no one ever uses from when it used to be hell's capital.

And if that can't be used then the sisters will just have it made by the costume maker. Thought it might be neat to have real armor though.

EDIT: Also, is cheating allowed in the showstopper by non participating parties? Assuming the cheating can be justified IC and is cleared with all involved muns of course.