Two
And Chopper...Chopper is just clueless. He is the prime example of the perpetual optimist, the epitome of the gullible fool.
His consumption of a certain Devil's Fruit may have granted him the semblance of humanity, but it seems that suspicion and discernment were not part of the package. The very existence of falsehood, deceit, trickery, and those who would use such things escapes him.
There are no ulterior motives, no darker possibilities. Where others might entertain some niggling doubt, some prudent hesitation, some innate mistrust, he takes everything at face value.
Yet even with this weakness, he is a precious nakama. Indeed, it is this very trait that endears him to his crewmates. And yet, even with the otherwise non-existent complications brought on by this innocence and naivete, such unwavering faith and unhesitating loyalty is something found only in those of exceptionally pure heart.
He may be clueless, but his unreserved sincerity and transparent honesty redeem him beyond reproach.