Kagekyo Clan

The Kagekyo Clan began years before the founding of the Four Noble Houses, making them one of the oldest families in the Soul Society. In time long past, the Kagekyo name was the name of a group of bandits and mercinaries, up until the Gotei 13 was founded. The leader of the bandits surrendered without a fight, on the condition that his comrades were spared as well. To show their unity with their leader's wishes, the group all changed their name to Kagekyo. Over the next few hundred years, the group acted like mercenaries for the Gotei. Even to this day, the true desendants have a natural urge to serve the organization's best intrest. The 'clone' family has the urge to destroy it, often by following Aizen's path.

Story of the Clones
The Demonic entity Blackheart began tinkering with Mod-soul and Reigai technology while possessing a low-rank Shinigami in the 12th Division. Wanting the best charecteristics of the Kagekyo Clan, he somehow cloned one of the Kensei, Shade Kagekyo. During the cloning however, something went wrong, creating a weak version. Blackheart later thought that he failed, until one day, his creation created a son for himself, then being destroyed and returned to life by the child.

Unique Abilities
The Kagekyo bloodline, unlike most others through the ages lack overt magical abilities, rather focusing on what they were known for once upon a time, defeating their enemies. They have only one actual skill passed down among themselves, known as the Black Torch Sacrifice.

Tactical Genius: All members of the Kagekyo family have acute minds for battle and tactics. One such case is Hayashi, the son of Shade. He envisions the battlefield like a chess board, divided into as many equal squares as he needs.

Mastery of Swords: It seems that among this clan, swordsmanship is often handed down in bloodlines, and later refined by the desendents of the family. Hayashi is a good example of this. From birth he was able to use swords like they were something he trained with for many years, but replicated his father's sense of skill, or rather lack of. As the years passed, he changed his style, getting more direct in his approach to combat.

Black Torch Sacrifice: Will explain later/