[The way she answers, plus the way she had helped Minato out in such an extensive way with teleporting out into the forest, just makes it clearer that they're good friends. ...Or at least friends who have known each other a long time.]
So he would still have been school-aged. Did you meet through the school here? [At that age, school was the best way to meet others. So, even though he didn't know much about the school system in the village, it seemed like a reasonable guess.]
[Voice]
So he would still have been school-aged. Did you meet through the school here? [At that age, school was the best way to meet others. So, even though he didn't know much about the school system in the village, it seemed like a reasonable guess.]