To unlock the Unladylike trophy in Little Nightmares 2, you need to find and smash a small porcelain statue of The Lady during the game’s fourth chapter.
The statue can be located immediately after using the zipline leaving the mail area. It should be the zipline with pegs that ping off as you slide down it. You’ll break through a window into a room. Instead of going forward, turn around and jump back out of the window on to the roof. Head along the rooftop and into the next open window. Jump in, pick up the statue in front of the door, throw it against the ground, and the trophy will unlock.