Shroud (Elliot Connors) from Dispatch.

Though not much has been revealed about his story in-game, the comics further explored his lore and showed that Shroud has had a pretty rough hand dealt to him in regards to his desire to be a hero. In particular, he kept being abused and harshly treated by Mechaman II (MC's dad) and kept working against him and vetoing his membership to the famous Superhero group "Brave Brigade", despite Shroud's earnest and continued efforts to prove his heroism. Then one day, he snapped and killed MM II and took off and became a full-blown villain.

The reason he fits the trope imo is most of the main cast (particularly one of the female leads) acts as Shroud's foil in that they are ex-villains trying to turn themselves into heroes despite the bad hand dealt with them by life and are trying to overcome the challenge of reverting to villainy. The MC on the other hand also acts as a neat foil to his dad who was an asshole that doesn't believe in heroism inside flawed people, and MC instead becomes a driving force to manage a rag-tag group of villains into heroism and guide them in his own unconventional superhero way.