The geisha is a symbol of Scatter, which can form a scatter victory if you place 3 or more anywhere on the reel. For 5 scattering, you can win 100 coins.
Samurai itself is a bonus symbol, and if you put it on the 1st and 5th rollers, you will trigger a bonus round. You will be taken to another screen filled with ninjas, you need to click on them to collect free spins and multipliers. When you meet a special ninja, another 3 people will be clicked and our prize will be awarded. When you hit a ninja without an explosion, your free spin will begin. If you re-trigger the game, you will win an extra 8 spins. Every time you win, you can choose the amount you win in gambling. If you decide to do this, you will be taken to another screen and you will have to choose the color of the card you want to draw next. If you make the right guess, your victory will double. If you guess wrong, you will lose everything and you will be taken back to the base game.