Perhaps the most mysterious of the group, and she likes to keep it that way.

Koken is a swordsman first and foremost. She appears to be at least half fire-jin, and can call up a small but powerful flame to throw at an opponent. She fights fiercely, and has many scars under her obsidien armor. Koken will enter any competition, legal or otherwise, to have good fight. Outside of the battle, however, she if very aloof, not wanting to lower herself to whatever the others are doing.

Koken can wield several types of weapons, but prefers an old-fashioned katana. She lives up to the image of a swordswoman, able to turn down men who throw themselves at her just as easily as she can hold down her favorite drink, sake. Cocky to the point of arrogance, she is all business when she draws her sword. She remains with the others because she feels she owes a debt of honor to Iyashi, who healed her after a perticularly close battle. She cannot be his bodyguard, however, because Kitsu already has the job. So she travels with them and waits for the opportunity to fulfill the debt.

While aloof and distant, Koken nevertheless lives by a very strict warrior code. She respects Kistu as a fighter, and applauds her in her attempts to teach Iyashi some means fo self defense.

Koken is in search of something. What, however she will not tell. Her family is unknown, because she never talks about it. She has quite a tempter when it is ignited, and has been known to scare away entire crowds just by glaring at them.