How can you Describe the Akatsuki in different words?

The (acting) Leader:

Pain

His partner: Konan

Kakuzu

His partner:

Hidan

Itachi

His partner:

Kisame

Sasori

His partner:

Deidara

The spy:

Zetsu

The (real) Akatsuki leader:

Tobi (a.k.a. Madara Uchiha)