I've noticed something about Hiei from "Yu Yu Hakusho" and Toshiro Hitsugaya from "Bleach". They are very much alike. So much that it's uncanny. Both are nonhumans that fight using elementals with short statures and equally short tempers. Each controls a dragon based on his elemental. Of course the elementals, fire and ice, would be exact contrasts of each other, appearing at opposite ends of the elemental charts.