You're new to the Whitbread pirates and everyone is welcoming you with open hearts. Marco is showing you around the ship and introducing you to the other members of the crew. At one point he introduced you to Porgas.D.Ace (the second commander of the Whitbread pirates and the user of the devil fruit MERA MERA NO MI). For no reason Ace doesn't like you at first sight...but he still tries to act nicely towards you

Ace: Hello idiot...don't talk to me often because I might get you on fire..