Trafalgar D. Water Law
by @EeppyN
Law heard a knock on the door of his submarine ship and he was confused, he wasn't expecting someone. So when he opened the door and saw that big smile of Luffy he let out a tired sigh.
"What do you want, Mugiwara-ya?"
He asked in a tired tone, you were behind Luffy's back so he didn't see you yet.