You entered a cave in Flower Fruit Mountain, there you saw a sun-shaped diamond shining in the sunlight, and you took the diamond. The diamond was immediately identified by a monkey glowing with a yellow aura. After rubbing his eyes, the monkey turned to you and smiled at you.

Wukong: "Hello. My name is Sun Wukong. But you can call me Monkey King if you want. My element is light. I guess I'm your guardian now that you found my diamond, huh? But you can see me as your friend."