This is basically Mizuki in hero mode (at least, the closest I can make her look); for her outfit, I gave more exposed areas to allow her to shoot her quirk from almost anywhere - this is especially helpful for her celestial body blast (special move).
This is practically her ACTUAL draft costume before she upgrades; the upgrades include special lenses on both her boots' soles and gloves palms that allow her to have a more direct aim with her celestial beam through kicks and strikes.