combination of 广 and マ


In an anime called ゴクドーくん漫遊記, there is a character called 一休（いっきゅう） who is
kind of a devilish imp. He, along with another impish character, bears on his
forehead a mark I cannot decipher. It appears to be a combination of 广 and マ.

!(<https://i.stack.imgur.com/ps0Ux.jpg>)

Can anyone understand this symbol and explain it to me?

