Hanako-san

Hanako-san is a character from Japanese folklore. She is often described as a ghostly girl who haunts the bathrooms of schools. The legend goes that if you go to the third stall in the girls' bathroom, knock three times, and ask, "Are you there, Hanako-san?" she will respond with a creepy voice saying, "Yes, I'm here."

Many kids in Japan are scared of Hanako-san and believe that she can harm them if they don't follow the rules. Others believe that she is just a made-up story to scare children. Either way, it's important to be respectful and cautious in bathrooms, just in case Hanako-san is lurking around.