Toyo is the name of a woman who is sometimes referred to as "queen". Think of it like playing dress-up and pretending to be a queen. When people call her a queen, it means they see her as a very special and important person. It's like if you were playing make-believe and one of your friends was the princess, you might call her "princess" because she's the special one in the game. Toyo might be called "queen" because she has done something really great or important, or because people just think she is a wonderful person who should be treated with lots of respect.