Khavatari Toruku:
To complete the Trial of Steel, you must fight against fighters of various races. The opponents you must knock down are the Vuku Orc fighter, ratman fighter, Langk lizardman warrior, and Felim warrior. Come back after you have collected three tokens from each race, for a total of 12 tokens.
And, don't forget, you must not use any weapon during the trial other than your bare fists or hand-to-hand weapons. A true Monk must be able to fight without depending on weapons!