To unlock the Unladylike achievement in Little Nightmares 2 you have to smash the geisha statue that can be found during chapter 4 (The Pale City) the statue can be found by heading back through the window you travel through after using the clothes holder zipline and heading to the window next to it. Here is my own video guide that shows how to get the Unladylike achievement along with all of the other collectible/achievements that Little Nightmares 2 has to offer. The guide for the Unladylike achievement appears at around the 20:25 mark during the video.