The Twelve

The Twelve (十二, Jūnii) is an organization of rogue Shinigami who have severed all ties with the Soul Society. Seeking to destroy the Soul Society, the Twelve stole a powerful object that endowed the spirits of the Twelve Great Beasts into them, killing off their Zanpakuto spirits and attaining new ones.

History
All former Shinigami who saw much more than the life of a dog for the Thirteen Court Guard Squads, they would team up to steal the Scroll within the Sōkyoku Hill. Escaping into the Hueco Mundo it would be there that they would use the scroll to strengthen themselves. Sacrificing the spirits of their Zanpakuto, they would gain new blades which contained the spirits of the Twelve Great Beasts. Each beast was a representation of the Twelve Signs of the Chinese Zodiac and each had outstanding power. Marked as enemies of the Soul Society, they would no longer be heard from for years to come.

Following the events in Karakura Town as well as the events involving Ichigo Kurosaki, the Substitute Shinigami they would rise back into the world and wage war with the Soul Society. Lead by a former member of the Tsuchigumo Family, Han Tsuchigumo would make it a personal goal to bring an end to the Twelve and redeem the honor that this rogue Tsuchigumo had sullied in the name of his family.

Groups
Members of The Twelve are normally split into groups of two to assure that a sole member can never be jumped or attacked by a Shinigami. Both are normally skilled in the same field and usually work together to reach their common goals. Some members however, don't have this way of thinking.
 * Okojo Tsuchigumo & Sanin
 * As Leader of the Twelve, Okojo with his main assistant Sanin are the strongest members of The Twelve. Okojo was a former Captain of the 3rd Division and Sanin was his 3rd Seat at the time.