Black Whirlwind. He is a dual axe-wielding mercenary known for his short temper, affinity for wine, and eagerness to kill. Though he is rather simple-minded and loves fighting, Whirlwind is not an evil but rather a chaotic individual. Zin Bu, formerly in charge of tracking and recording the student's actions, at one point remarks that an entire department is not enough to properly track Black Whirlwind.
Source: Wikipedia, "Jade empire", available under the CC-BY-SA License.