Invincible

Markus Sebastian "Mark" Grayson is the main protagonist of the series of the same name. He is a Viltrumite-Human hybrid superhero Invincible, the son of Nolan and Debbie Grayson, the paternal older half-brother of Oliver Grayson, the boyfriend of Eve Wilkins/Atom Eve. Born as a Viltrumite-Human, Mark would ultimately gain his powers and start training to become a hero under his father's mentorship. Following a short involvement with the Teen Team, Mark teamed up with Atom Eve, the second version of the Guardians of the Globe, and Cecil Stedman from the G.D.A. to safeguard Earth from all known threats, while also attempting to protect Earth and the entire galaxy from the dangers presented by the Viltrum Empire.