The ninja of the Black Rose are trained from their earliest years in the arts of grace, seduction, infiltration and subterfuge. Their physical forms are surgically altered to the ideal of beauty. Their training in the martial arts is less vigorous than that of many other Ryu, but they are no less capable at their tasks. Needless to say, the Black Rose ninja are recruited from both genders to widen the field of targets.
The most prized virtue of a Black Rose ninja is patience. The Black Rose may spend days, weeks, even months gradually insinuating themselves into the target's life and environment, setting themselves in positions where they can meet their mark and seduce him. The seduction process may take as little as several minutes, or as long as is necesary. Some unfortunate fools have even married the "love of their life" after months of courtship, only to fall prey to their "beloved" in the bridal suite.
Little of any substance is known of this elusive Ryu, save that the fate it can inflict goes beyond the boundaries of death. They can erase your existence both past and present. They can delete your stored memories so you may not reincarnate. They can make you little more than a shadow.
The Ghostwalkers have been known to make an accidental death permanent, deleting a reincarnating samurai's memories, but this is the least of their creative assassinations. In extreme cases, and with sufficient payment, they will undertake a Wraith Contract on the unfortunate victim. Working in conjunction with a more physical Ryu (usually the Steel Claws with whom they have a strange affinity), they will gradually and painstakingly have everyone who knows the victim assassinated, often falling afoul of apparent "accidents". As the victim falls to despair, the Ghostwalkers erase all records of his existence, leaving him utterly alone and without identity. After suffering this fate for a short while, the tragis soul will become a real ghost as he falls to the final termination.
Strangely, the Ghostwalkers never participate directly in a killing, and few possess any of the martial skills that make other Ryu feared. However, people whisper their name with anxiety, and cold-running fear slithers in their wake. They can kill without a touch. They can make you suffer. They are the Ghostwalker Ryu - ghosts in the machine.