To obtain characters, you’ll need to correctly answer three questions from any category. At the bottom of the screen you will find a bar that will fill up with each question that you answer correctly. Once the bar is complete, you will be prompted to choose the category of the character you want to receive for which you will then have to correctly answer a question from that category, in order to earn it.
You will also have the possibility to land on a crown when you spin the wheel. Then, the game will prompt you to choose the category of the character you wish to receive and, if you answer correctly, the character will be yours.
Once you have obtained the character, the bar will reset.