Elemental Gelade Vol 1

Elemental Gelade by Mayumi Azuma. A Fantasy manga rated Teen, published in English by Tokyopop.

Young sky pirate Coud cracks open a mysterious crate and finds Ren, an Edel Raid, a girl who is also a living weapon that can fuse with a human partner. Now every power in the land wants her, and Coud vows to protect her. A fun fantasy action adventure.