Tadashi blinks owlishly through Akito's outbursts. That 'Oyaji' definitely catches his attention, but he only has about three seconds of smile-suppressing to worry about before 'cute' becomes a thing. Not exactly what he expects to hear from sick teenagers in random alleys, but he takes it with good grace, posture loosening now that Akito is obviously in a better state of mind.

"Of course it's okay. Nice to meet you, Akito." He sticks out a hand in the boy's direction, offering to shake. "But now you've got a choice to make. You've got two piggy-back-capable guys here." He grins and laughs a little, as if he's made some kind of clever joke (spoiler: he hasn't, he's just a huge dork). "The power is yours."

... Alright, he might've been thinking about that old Captain Planet reboot he used to watch as a kid. Still a dork, though.