Agent Peacock

Anime and Manga

 * Yukari from K is this personified. He's probably the strongest non-King fighter in the series (along with his adoptive younger brother Kuroh, also a Long-Haired Pretty Boy). Yukari is a Dance Battler who takes down entire squads from powerful Clans easily. He also spends his time enjoying skincare products, fashion, and other pursuits of beauty.
 * Nathan Mahler of Blood+ seems to use his flamboyant qualities to conceal some of the darker elements of his personality.

Web Original

 * Hazbin Hotel has Angel Dust, who is a gay spider demon Drag Queen porn star turned prostitute/crime boss. He's pretty, flamboyant, flirtatious, masochistic, sarcastic, sassy, and crass. Niffty mistakes him for a woman, and he never bothers correcting her. He'll sleep with just about anyone if there's money in it for him, which funds his drug and alcohol addictions. He has no problem being called a slut, and mocks his client for resorting to such an overused insult. He even propositions Alastor, who is The Dreaded in Hell, when they first meet, but is refused. He takes every opportunity to mock and taunt friends and foes alike, deliberately using sexual innuendoes to throw them off. Despite all of this, Angel Dust was a 1940s New York mobster in life, and his time in Hell has made him even more dangerous. He cheerfully participates in genocidal turf wars, casually slaughtering hundreds of enemies with machine guns, baseball bats, and explosives. He also laughs off a death threat from Vaggie; everyone in Hell is already dead, so killing him would be pretty difficult.

Western Animation

 * Raymond from OK K.O.! Let's Be Heroes. He has a fancy hairstyle and holds a rose in her teeth, in a manner reminiscent of stereotypical bullfighters and flamenco dancers. In the episode "Project Ray Way", he even tries to start up a fashion business of his own.
 * Darius from The Owl House. He's a Sissy Villain with an outlandish sense of fashion and a snobbish attitude towards getting dirty, but one does not become a coven leader by being a push-over, being able to use abomination magic with deadly precision.