Minako rubs the back of her head where her rude brother just ran into her without apologizing.

"Calling would've taken too long, too!" No, it probably wouldn't have, but she was far too caught up in the chase. Also she had expected to meet up with him before they got all the way back here.

But... right. Shinjiro and Minato are sizing each other up now, so she should probably introduce them even though they already know each other's names... "Senpai, this is my brother, Minato. I hope you can be friends." You both can use more of them, in her opinion. It doesn't matter that Minato probably had just as many social links as she did, back home.