If you come accross her she has a mask on (in japan people wear them normaly not because of covid) she will ask am i pretty if you say yes she will take down her mask to reveal her slit mouth then she will once again ask am i pretty if you say yes again she will take out a pair of giant scissors and slit your mouth and kill you. Back to the first am i pretty if you say no she'll kill you right then and there. But you can distract her by giving her a middle answer like you look ok or average or give her candies.
Yes, I'm aware of the entire story with the origins... A soldier/husband came home from war and the wife was mad, so she just took scissors and cut both of their mouths....