The reasons why Pineapple Fubuki became black are as follows:

1. Psychological trauma: Pineapple Fubuki once experienced some psychological trauma. In the first season, his friend Cheng Liuxiang was captured by the enemy. , causing him to feel extreme loss and despair. These experiences made him more vulnerable and easily frustrated, leading to blackening.

2. Being controlled: In the second season, the villain Demon King controls Pineapple Blowing Snow’s thoughts, giving him a tendency to become dark. In this case, darkening is a passive form. For his behavior, Pineapple Blowing Snow did not actively choose to become a black man.

3. Self-protection: In the third season, Pineapple Blowing Snow had to take extreme measures to protect the members of Guobao Special Attack. In this case, going dark is a way of self-protection. Thinking that this is the only way to protect yourself and others. Pineapple Blowing Snow is a character in "Fruit Fruit".