Eve

Eve is an artificial human created to be the first in a line of super soldiers, having had her DNA fused with nanomachines that allow her to change her body's shape and genetic make-up. Raised to be emotionless, she finds normal experiences to be new. In the anime, she first meets Sven and Train when Sven wants to save her while Chronos sends Train to kill her. In the manga, Eve encounters Train and Sven while they are working as sweepers, and she joins them after being rescued.