He served only the Fire Lord.
He hunted his prey with extreme efficiency.
He only did it for the money…
…or was it something else?
He was known as Karyuudo.
He had been hunting his prey for some time when it began to rain. Drops fell from the sky and sunk slowly into the dirt, which became soft as he ran across it. His prey was not too far in front of him; it was running, but he was catching up. He drew a shurikin from his pocket and threw it at his prey; the shurikin stopped in his prey's back, causing it to fall to the slippery mud. He approached his prey and looked down; comparing it the bounty he had received, it was a perfect match. He looked at his bounty and saw that his prey was wanted dead. Screams from the man on the ground below him were heard as he slashed the man several times with his katana. The screams stopped as the katana was sheathed.
There were other ways to get money.
But this way made him feel good.
He never knew why
He never asked
He did not want to know
Karyuudo silently picked up the body and walked away through the rain.