It was a rather late realization on my part that clothing on its own could be dangerous if enchanted, but I'm so happy it DID occur to me in time, because I love that last panel.
That, and it's a really good point. Nanase's swimsuit could have been a One Piece of Armor Piercing Titan Strength or something, or her hairband a Hairband of Eye Laser Beams. These are things you have to be ready for when dealing with magical nonsense.
Going back to that last panel, I really want to make "Sarah stops caring about physical modesty the moment something cool adequately distracts her" canon across all universes.