Melissa Burgman

M.B., also known as Melissa Bergman, is the main antagonist of the Heroton Productions Canon of the Metroid series.

Story
M.B. originally was created as a prototype for that would eventually become the Aurora Units seen in Metroid Prime 3: Corruption. After discovering the artificial intelligence known as "Mother Brain" on Planet Zebes, the Ringleaders of the Galactic Federation commissioned the R&D team aboard the Bottle Ship to replicate the A.I. Originally created as a biomechanical brain in a pod (Similar to how the Aurora Units and Mother Brain appear), it was later decided to construct a physical body for it, so it could better learn how humans behave.

Using the recently deserted Samus Aran as the basis (Thanks to a reluctant Adam Malkovich), MB was given the form of a young woman, who mirrored her template almost as if they were sisters (MB has noticeable differences though, such as being a foot shorter than Samus).