Mako: “W-Wooowww!! Onii-chan is really big!”
One of my headcanons is that Ira met Mako when they were elementary kids, but go to different schools. They probably met one day when Mako got lost by chasing a butterfly and then she bump into Ira. Ira was weirded out by Mako’s oogling
(who wouldn’t oogle at a super tall onii-chan?!). He tries to lose her by zigzaging through various alleyways but Mako is persistent in following him because he’s like the coolest and tallest boy she ever saw, yo!
Eventually, he does lose her but then feels slightly worried since they’re not in a really safe area. So he goes back to look for her and finds some older teen bullies hurting her. He defends her and get hurts along the way. The bullies then lose interest in beating them. Mako thanks him gratefully and with Mako’s shining dazzling eyes, Ira then has a life calling to do justice to those who are weaker than others.
So afterward he helps Mako go to a familiar street and the two say good bye to each other. Only both realize, they never gave the other person their name. Ira develops this habit of helping others after school in case they’re lost or in trouble, and secretly hopes that he’ll meet that strange hyperactive girl again one day. They don’t until the series present timeline come up, by then, the two forgot most of the incident.