Unlikable main character.
I should probably mention that I liked this series. Just watched all the episodes online and thought it was pretty entertaining.
That said, I can't really say that Afro is a likable protagonist. I get that he's supposed to be so consumed with revenge that nothing else matters, but all that accomplishes is making him no better than any of the hundreds of people he killed.
He indirectly gets everyone who has ever cared about him killed, and he never deals with this emotional! Hell, he never even shows any emotion. The end fight didn't seem very fulfilling because nothing really changes with the character. He's still an angry killer. He never expresses guilt over all the people he killed, he never grieves for the family and master he caused to get slaughtered...hell, Number 1 mentioned that his father was "soft inside" and at least a little remorseful for all the people he's killed, yet you don't get that impression with Afro.
I mean, can someone explain to me how can in any way be considered a hero (especially after trying to kill his childhood friend) and how anything he did in this show represents the actions of a Samurai?