Yin-Yang is the amalgamation of two characters: Yin and Yang. The two halves have vastly different personalities that contradict each other. They share one body and are in constant disputes, even over simple tasks, such as what direction to walk or what to drink.

Yin, the white half, is good-hearted, honorable, and rational, whose intent is to balance out Yang, who is massively profane, malicious, and immoral. While Yin is happy to participate in challenges and actively tries to help out.