Desiigner is a villain and possibly the main antagonist of Edgy Oobi.
Desiigner is a rapper in the real world. In Edgy Oobi, he is a villain bent on destroying Oobi and Uma. In "Grampu Gets Killed by ISIS," he is an ally of the kidnapper hands and gets sent to Oobi's house disguised as a replacement Grampu. In the next episode, "Oobi Tries Lean," he steals all of Oobi and Uma's table candles and harnesses their power. After revealing his true identity to Oobi and Uma, he pelts them with candles in an attempt to destroy them, but his lean-vision gets the best of him and he can't figure out where to aim the candles. He misses Oobi and Uma with every shot and uses up all of his candle power, and the episode ends with him exploding from humiliation and a lean overdose.
Like the other characters, he is a bare hand puppet with no clothes, but he wears a Desiigner mask.