[Plenty of friends already? That sounds exactly like something a guy without any friends would say! You don't have any real friends, do you?! Oh no... Oh no, that would've almost turned Gintoki away from stealing food more than any vulnerability ploy---

Almost.

But as a proper protag to this moron's antagonist - he stays and shifts his weight onto the arm that was planted on the other's desk. Even catches the pointy end of a chopstick in his vision, and he's made a mental note of it. He'll beat it away if he has to.

He's no longer a protagonist, but his luck stat must reflect what he once was in a universe far, far away...]

That's a lot of responsibility. You ever think about that? Sorta messed up to leave it all on us.

[Now he'll make his move against the threat and motion towards the other's bento.]

Oi. That peach looks like it might got a bruise. You see it?

[... And he's poking towards it with his free hand.]

Oh. Oh that's a nasty one. It might've gone bad. Maybe you should take that one to compost, don't 'cha think?