Sky Girls

Sky Girls (スカイガールズ, Sukai Gāruzu) began as a single episode OVA anime by Konami, directed by Yoshiaki Iwasaki and animated by J.C.Staff. The 30-minute episode was released in Japan on August 25, 2006. A television adaptation of Sky Girls started on July 5, 2007, and ended on January 11, 2008.

Plot
The Weapon Of Raid Machines (WORMs), which devastated the Earth have been sighted once again. Three young girls are gathered at the Oppama base, and trained to pilot Sonic Divers. They learn they have been chosen to save the Earth from destruction. Aboard the secret vessel number 113, the Koryu, Sonic Diver Unit team members Eika, Otoha, and Karen help protect Earth against the WORM threat with their flying exoskeletons (in the TV series, a fourth then fifth girl is later added).