Yeah Riku feels so poorly written and the weakest part of the series. What's his motivation with anything we've seen so far? He had the four Perils killed, but we were never given an explanation for why. His interest in Towa seems to mean that he's just a love interest for her, and yet he seems to forget that Zero is trying to kill her and sister and cousin.Riku. He's gonna be Queen of the Pirates.
And we're still playing the game of bad-guy-or-not?