Birdy The Mighty

Birdy the Mighty known as Tetsuwan is manga by Masami Yuki. The TV anime adaptation, titled Tetsuwan Birdy: Decode premiered in Japan on TV Saitama and other broadcast networks from July 4, 2008.

Birdy Cephon Altera is a Federation agent chasing interplanetary criminals to the planet Earth. While in pursuit of one, she accidentally kills a high school boy named Tsutomu Senkawa. Fortunately for Tsutomu, there is a way to keep him alive, although he ends up merged into Birdy’s body and must remain so until the repair of his body is complete.