Micaiah (Fire Emblem) from Fire Emblem in her Yukata attire from the Fire Emblem Heroes 2018 Festival in Hoshido banner.
It consists of a Red Yukata with a Butterfly Print pattern all over it, as well a big Blue Bow. May feature her weapon, a Kagura Suzu known as the "Dawn Suzu".
Don't confuse with Wavecrest Maiden.