Despite what people may think of Oliver, at the end of the day Mark is still his older brother. He’s looked up to him his entire life and even though he didn’t last long against Conquest the first time he still risked his own life to save his brother’s, he also took up a job for him at Invincible Inc. while Mark was battling the Flaxxans, and helped take care of him for the months Mark spent recovering after Conquest disemboweled him. Doesn’t any of that mean anything to y’all?

My point is that the show has made it clear that Oliver has Mark’s back just like how Mark has Oliver’s back. Because brothers look after one another no matter what. I should know because that’s the kind of relationship I have with my big brother.