If you're doing that fanfic wip game- how about 'smile' :0c?
There’s a LOT of ‘smile’s so I’m just gonna pick my favourite here.
From Blackout - chapter 2:
“Who are you? No, maybe that’s the wrong question, yoi…” Marco’s eyes narrowed further, into dark little slits. “Maybe ‘what are you?’ is more appropriate, because you’re not really a person - are you?”
A smile pulled at Sanji’s lips that didn’t meet his eyes.
“That’s a little rude, isn’t it?” Sanji stepped forward and reached up to stroke Marco under his chin, like how one might with a pet bird. The man jolted, stepping back with an agitated look. “What else would I be, if not a person?”
“Why don’t you tell me, yoi?”
Sanji grinned sharply. “I’m a magician, want to see a trick?”