John Gillman, better known as the Homelander, is the secondary antagonist of the 2006 comic book series The Boys and the overarching antagonist of "I'm Your Pusher," the third episode of The Boys Presents: Diabolical.
He is the leader of a famous superhero group known as The Seven, who often make matters worse rather than improve any situation. Homelander is among the worst of the already sociopathic team, as he believes he can treat others as less than human because he gained such immense power.
As such, Homelander is the sworn enemy of the series' deuteragonist Billy Butcher, serving as the primary target in the latter's revenge campaign, with Butcher mistakenly believing that Homelander had raped Butcher's wife and got her pregnant, which ultimately resulted in her death in the end. Throughout most of the series, Homelander and the Seven have few interactions with The Boys due to a tenuous truce held between the two groups to keep things from escalating, while genuinely confused and unsettled by Butcher's hatred of him.
Like most of the superheroes in his universe, he is a dark-as-mud parody of more popular superheroes such as Superman and Captain America, deconstructed into a twisted villain protagonist. Indeed, while most superheroes are flawed but ultimately benevolent beings, Homelander is the exact opposite, for he is a powerful entity and highly malicious super-being who will do anything he desires, like being a predator and wanted criminal in the process.
In the animated series The Boys Presents: Diabolical, he is voiced by Antony Starr; who also portrayed the character's live action counterpart, Lucas Hood in Banshee and Rutledge in G20.