Seventh Division

The Seventh Division (七番隊, nanabantai), also known as Squad 7 in the English Dub, is one of the Gotei 13, headed by Captain Sajin Komamura.
The seventh Division follows the traditional organization of a Gotei 13  Division.
No special duties have been noted for the seventh Division. This division is made up of sincere, unpretentious people who live life with gusto. Captain Komamura and Lieutenant Iba believe strongly in moral obligation and compassion. This ethos has been passed down through the ranks of the 7th Division.
Like all the other barracks, the 7th Division Barracks house the offices and living quarters of the Shinigami of the 7th. Komamura keeps his dog, Gōrō, at the barracks.

Info from :  http://bleach.wikia.com/