[ WELL technically he was asleep for a good chunk of the time he's been traveling. But thanks to worlds experiencing time differently, he can't really be all that sure how long it's been since he first started anyway. And it's not like he pays any attention to it in the first place. ]

Your senpai? [ Sounds like she means he's a senior to her? From her context clues. ] Yeah, I guess so. [ He thinks?? Maybe? ] But how long we've been doing it doesn't matter! A hero's a hero, no matter how long it's been!

[ Encouraging hero Sora, at your service. ]