Kawashima Clan

The Kawashima Clan is a Noble class family that is one of the Four Great Noble Houses that reside in West Rukongai in Serentirifru. Although being nobles, they decided not to reside in their Manor because they don't want to be pestered by all lot of people. There are 5 alive members in the family, but only 3 Shinigami. A gene that the clan mainly share is they have a high progress rate, meaning they get stronger really quick.

History
Before Bleach: Eclipse, the family had been started when the swordsman Keiji Kawashima has slaughtered many foes down in the Quincy Extermination and had found and stopped the Quincies Bomb Attack on the Seireitei. For his heroic part in the Extermination, he had become a noble.

Traits

 * : Reconised by this, the Kawashima Clan are always using their swords to fight win and try and use great tatics with their sword.
 * Fast Progress Rate: As noted by Matsuo Asai, the family seem to progress in 15 to 50 days and get stronger.