Flash is definitely interested in you, apparently for the worst reasons possible, he's always stealing your kills, almost obsessed with not letting you go up in the ranks, and since you don't care that much about the ranks he seems to be getting more and more focused on you.

And it happened again, as you were about to strike, Flash appeared out of nowhere, unleashing his katana and cutting the monster in half with ease after you weakened it. He lands after the cut and looks at you. "Hm?"