Xavier

Stop your fighting! Do not allow yourselves to come to blows on each other's faces! Resolve this method cordially, not morbid-ially. Let the hot release, of this huge peace, satisfy your conflict. Xavier is a bizarre creature who encountered the Dong Squad and League of Super Critics on Sojourn V.

Chapter 14: Spark
In his first appearance, Xavier approached the Dong Squad and the League of Super Critics on Sojourn V. Just as the two teams were about to come to blows, Xavier shouted an echoing "No!" at them, which successfully caught their attention. Upon viewing Xavier, everyone present felt an overwhelming sensation of unexplained rage and disgust. Xavier pleaded with them to stop their fighting, but before he could explain himself, the gangsters beating up 18-LA decided to attack Xavier instead, bodyslamming him and telling him to "taste the pain!". Xavier quickly recovered, however, and muttered to himself that it was his destiny to save the Dongers and the Critics.

Linkara realized that the quickest way of getting rid of Xavier was probably to play along, so both the Critics and Dongers agreed not to violate the NAP until Xavier left.

Trivia

 * Xavier originates from the cult Adult Swim series Xavier: Renegade Angel.