Mark Grayson ( Invincible)

Markus Sebastian "Mark" Grayson is the titular main protagonist of the same name He is the Viltrumite-Human hybrid superhero Invincible, as well as the son of Nolan and Debbie Grayson, the paternal older half-brother of Oliver Grayson and the primary love interest of Atom Eve.
Being a Viltrumite-Human by birth, Mark would eventually attain his powers and begin training to become his own hero under his father's wing. After a brief stint with the Teen Team, Mark worked with Atom Eve as well as the second iteration of the Guardians of the Globe to protect Earth from both domestic and extraterrestrial attacks as well as trying to defend Earth and the entire galaxy from the threat of the Viltrum Empire.
== History ==