[blink. he genuinely doesn't get what otto is asking for a few moments. when he speaks, he sounds very unsure.]

...It means I ate when I felt like it...?

[bet you can guess what that means, can you.]

I mean, eating didn't actually felt like it did anything? I hadn't actually felt hungry since coming here, so eating was kind of a formality...?

[and to a sharp mind like Otto's, that's more than enough to infer that there was more to Yusei's power than "no sleep required." what kind of power removes the need to eat and sleep?]