Silvers

This Manga being one of the very few i have read was really well done. Patchy in some places, as in story plots didnt make sense or werent given enough information to make them understandable. 

[SPOILERS]

Basically this manga is about a girl called  Aiko who was found at a murder scene dead and should be dead, but when she awakes in a secret hospital obviously now alive, she has no recollection of what happened that night. Until a monster showed up and her memories flood back. Her arm changed into a powerful weapon similar to the monster, a chimera arm unable to control the arm she destroys the chimera and in odd chapters close friends making her lose the will to live. The secret organization Atheos asked her to help them fight off the chimeras. An accident happened that led Aiko to understand how much she wants to live, and decided to join Atheos, in order to find her place. In the end she realises that Atheos itself created Chimera's and wanted to use her to create a new more potent weapon.