There is a circumference around someone's hair, as in, you can see a circle drawn around the top of their head. As you examine it closer, and pull at it a bit, you realize that someone has carved the hair off someone's head!
When you think of all the people who could have done this... all the people who could have carved out someone's hair, only one person comes to mind, and that is Mrs. Chou (ちょう). She's the only person evil enough to do something like this.
Currently there are no similar looking kanji which exist in the WaniKani learning system