Before anyone asks, nein, this is just a fan edit, its not official. However for context, during the CN livestream a few days ago, MICA announced that they will be holding a Girls Frontline dedicated expo around the 5th of February somewhere in Shanghai, the promo image showcased all of Anti-Rain and 404 as well as UMP40 wearing some rather festive clothing, all frilly and cute and everything, its great, mainly AR-15 (Change my mind). Let me see if i can find the screenshot-- Here it is
Edit: Well shit... I spoke 4 months too soon... all the expo costumes will be added into the game soon.