It wasn't that Flauros had intended to spy on Yako, but as it turned out while Yako had been sitting on a bench all day; Flauros had been stalking around in Emptiness, alternating between his leopard form, and human form. The demon had himself a wonderful time breaking into the butcher shops, and eating some of the meat found withing; he also had fun stalking and slaughtering some of the animals that had found themselves in Emptiness.
It came to no surprise to Flauros that upon reverting to his human form he happened to have blood on him. "Guess I better change," he smirked to himself as he removed his suit jacket, and folded it over his arm. He proceeded to walk back to Emptiness, whistling to himself, and passing by Yako.
Passing by Yako? When he realized who was on the bench, Flauros turned around at looked the teenager. "Hey, what's wrong Lemon-cake?" Flauros asked with his usual tone of mischievousness.