Fan Casting Birdy Cephon Altera in Dimensional Collide

An alien from a collection of star systems called the Space Federation, Birdy Cephon Altera is one of its police officers, pursuing Christella Revi, whom she has personal enmity with, to Earth. Chasing down one of Revi's associates, Geega, the pursuit eventually results in the mortal wounding of teenager Tsutomu Senkawa by Birdy's own hands when she mistakes him for Geega. This, in turn, results in forcing Birdy to merge with Tsutomu to save his life and the two having to coexist in the same body and help each other. However, her pursuit of Revi gets stranger with Revi's new choices of allies -- and three men turning to Birdy with an alliance of their own they want her to join.