Done. With more to be added as needed, of course.
Although not a character, here's a villainous(?) organization.
Chrysalis
Chrysalis began as something of a government project to study and investigate superhumans. Its original goals were to simply study and categorize metahuman abilities and assess them in terms of potential threat and usefulness. As things progressed, it quickly expanded its scope to isolating origins of abilities, artificially creating them, and otherwise producing new superhuman beings through various means. It was officially shut down once the excesses of its leaders were made known, but a majority of those leaders and other like-minded individuals went underground to continue their work.
Simply put, Chrysalis has the following main goal: the guided evolution of humanity into a more perfect being. They have a number of expert scientists in fields such as genetics, genetic engineering, biotech, and cybernetics. Although, as something of a shadow organization ,their members have to trade secrecy for freedom to experiment without moral or ethical constraints. Bay and large, Chrysalis continues to exist mostly through underground or illegal sources of funds. They do a brisk business on the black market, with new drugs and cybernetic enhancements for those willing to pay top dollar for a more than human edge. Their more capable and independent creations are also sent out either as mercenaries or directly for the organization itself.