Luffy
He was an idiot.
He knew that those were the words that went through the minds of all those he met for the first time. With very few exceptions. But he was human, unlike many people he had met. He had watched Marines and pirates alike kill ruthlessly, then plead for their own life later. He cared about his crew. They were his nakama, his family. He doesn't remember when the family grew from Ace and the late Sabo, but somewhere it did. He is smarter than he looks. He is quick, and never tolerates any snap towards his friends. But he is just one person, rubber or not.
"I'm only human."