Barry the Chopper

A butcher who uses the disguise of a female so he can abduct women.

Manga:
A wanted serial killer and later an experiment in 5th laboratory. He falls in love with Riza when she was out grocery shopping in vol. 7. By that, he was caught by the military. He later helped Maria Ross escape from prison.

In the original anime,
he goes after Winry, but Edward eventually gets the best of him. He was seen arrested, but later reappeared as a soul bound to armor.

"I kill, therefore I am." ~ Episode 21