Matt is effeminate and characters assume he's going to be a villain, but he turns out to be the hero, and saves the day.
Matt dresses like a sissy villain, but comes off as incredibly butch personality wise.
Matt is wearing a girly Clark Kent Outfit and is actually hiding the fact that he could easily punch out anybody who opposes him.
Double Subverted: Matt is effeminate and seems to be a hero at first, before making a Face-Heel Turn
Parodied: Matt's an effeminate villain who wants to take over the world so he can make everyone fashionable.
Matt's Chaotic Neutral and so while he's constantly feminine, his level of villainy varies throughout the series.
At first Matt appears to be one of these, but it turns out the actions that appear harmful are actually helping humanity in the bigger picture, however it later turns out that Matt was unaware he was doing good, and acting solely out of self interest
Matt has multiple personalities, some good and effeminate, some good and not effeminate, some evil and effeminate, some evil and not effeminate
Averted: Matt displays no overly feminine traits.
Enforced: "Carol, all of our male characters are very masculine. We need to demonstrate that this guy's different. Give one some feminine traits to make him stand out."
Lampshaded: "We're looking for a criminal, he was wearing a feather boa and eyeshadow..."
Invoked: Matt decides to freak people out by acting like a woman
Exploited: The hero meets a drag queen, being Genre Savvy he realizes that the drag queen will be the villain.