"Sta -- what? No! Baymax wouldn't! He's a healthcare companion. Okay, and he helps me fight sometimes, with my upgrades I made."

Not that he had the armor on at the time, given they had just been in his bedroom at the time. Which reminded him....

"I better get home sooner rather than later or my aunt will have everyone out looking for me. And kill me. Not to mention the Professor at university....."

And his homework. But he could worry about that later.