Y'all better pray that Sanji acts weird towards S-Snake, cuz if Sanji acts normal towards S-Snake, I'm definitely gonna tag a lot of y'all.
He won't act weird. Sanji is kind towards children under normal circumstances.
Honestly, I hope S-Snake uses her Fruit on Luffy, Zoro, Sanji, Chopper, Jinbei, Brook, and Usopp, and have them all not get turned to stone.
Luffy: "Wow, it's really a half-sized-Hancock. How can we tell if she's on our side?"
Zoro: "What a strange brat... I wonder what that power is supposed to do..."
Sanji: "Wow, so she's cloned from the Pirate Empress!?! Listen, young miss, come with us, we'll protect you! Don't trust those evil government guys!"
Chopper: "Why is she pouting and grumbling?"
Jinbei: "Oh, she must have the same amount of pride as the original."
Brook: "I'm not happy about fighting on a battlefield filled with clone children!"
Usopp: "What if I lie, and convince them I'm the King of the World, and run the World Government? Would they listen to me?"