This is my favorite piece so far in your series (and that's not solely based on subject matter!). The ethereal color scheme of the background is lent movement by the swirling souls around him, and I am reminded of the underwater world of his beloved Blitzball, a touch not lost on a fan of FFX.
Tidus himself appears accurate to the game design, from his tattered pants to his mismatched gloves, and the two keys to his life, his sword and his ball, are positioned excellently according to the Rule of Thirds. My eye is immediately drawn to the both of them, and continues to move throughout those cool colors of the background. The proportions of his body look correct, as does the perspective of his flying leap.
All in all, I cannot think of anything I would correct for this deviation. Excellent job!