He does tend to linger near the food in between talking to people, even though he's already eaten the small amount he intends to have. And even that was partly out of politeness and partly because Katsuya's baking is just that good.

"When it seems the courteous thing to do." He raises his eyebrows just a little when Natasha deliberately strolls into his surveillance area field of view. Still, they've spoken before, and he recalls her positively enough to smile faintly. "Miss Romanov, correct? I hope you've been well since we met."