Minato's Mirror on the other hand isn't exactly looking for the sword either, though he had the same sentiment that if he happened to stumble upon it, then all the better. He had something or someone else in mind instead to deal with.

He headed up the stairs past the second floor after having explored the first. Now it was just a matter of getting up to the right floor after his prey instead. He did take a look on occasion outside, finding that it really was colorful out there. Just like in the pictures. Sigh. Life is so... Hard to describe.

At either rate, Minato was perhaps much more focused that he normally would be about something. Thus if he passed by Kaneki's sight or even right by him as he passed the tearoom, then such as it was.