Tsutomu Senkawa is an average high school kid who is busy studying for his senior entrance exams. Tsutomu goes out for some fresh air, after a hard day's work studying for a big test, when he runs into a guy fleeing from a pretty young lady. The pursued man is actually an interplanetary criminal on the run from a Federation agent called Birdy Cephon Altera. Caught in the midst of this chase, Tsutomu gets thrown by the man at Birdy, which kills Tsutomu. Fortunately for Tsutomu, there is a way to keep him alive, although it comes at the price of discarding his body. He ends up merged into Birdy's body.

**Real Name:** Ayumi Nagashii (永椎あゆ美)
**Height:** 156 cm

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__Non-anime roles:__
Candace - Genshin Impact
Eruruu - Utawarerumono series

Stephanie Young is an American voice actress who works for anime series of FUNimation Entertainment. She has provided voices for a number of English language versions of Japanese anime films. She is also a jazz singer, currently being the lead vocalist in her husband's band, "The Brehm's".

This OVA connects the first and second Tetsuwan Birdy DECODE seasons. 

Birdy uses her pin-up alter ego to help Tsutomu make a love connection with Sayaka, but everything goes horribly wrong when a Federation marionette is added to the equation! 
 
(Source: FUNimation)

After two years of being dormant inside Tsutomu Senkawa, an accidental encounter with their old nemesis violently wakes Birdy up. With Birdy kicking evil's ass once again, the dark secrets of the experiments conducted by the "Agni" corporation are slowly revealed. They seem to be dabbling with human body enhancement, creating what they call "beast men," to combat the alien invasions related to Birdy. 
(Source: MangaHelpers)

A remake of Tetsuwan Birdy.
 
While pursuing a criminal, the pretty but reckless interplanetary police officer Birdy Cephon Altirra accidentally kills Tsutomu, an earthling high school student. To make amends, Birdy is forced to share her own body with Tsutomu's spirit so that he can continue his own life. At first, Tsutomu knows nothing about his situation but soon discovers that his body is starting to take certain actions without his mind ordering it. In times of action, Birdy takes full control of their shared body, transforming it back into her original female form.

Nechla Geeze