Baymax waits patiently as the little boy stares up at him in wonderment. When Diarmuid does find his voice, though, Baymax blinks once for lack of other facial expression options. Because why is he being called 'lord'?

"I am a robot," Baymax explained. "Tadashi programmed me to heal the sick and injured."

"It is nice to meet you Diarmuid Ua Duibhne," he added. "However, I am afraid you are mistaken; I am not a 'lord' of anything."