I walked up to you.

[Obviously, he said, not really explaining anything at all. But anyways, he tilts his head to look at the symbol she found.]

Hm, the notice said there are more of this hidden symbol he found. Perhaps if we find more- a pattern, maybe -they may be truth in what was written on the noticeboard... Although this may just be an elaborate joke or whoever is making up their own stories about the symbols. [He will remain skeptical, despite Mukuro's find.]