Ophelia interpreted the boy's embarrassment to mean that she had overestimated his age, and therefore, his interest in the opposite gender. Girls did tend to be interested in that sort of thing more quickly, didn't they? It had been so long since she herself was in school that she tended to think all Hogwarts students looked unspeakably young, but she supposed this one did look on the younger side even given her predisposition to lump all students into the same generic category.

"Well," she said, making a slight tsk noise with her tongue as she pulled her shawl a little tighter around her shoulders. "You never know what will happen in time. Shouldn't you be with your schoolmates?" She didn't think there was a holiday that she'd forgotten about, and now that she had decided the boy before her must indeed be young, it suddenly seemed conspicuous that he was wandering about on his own.