Mary

Mary was a modified human who served the Union as a member of its Assassination Squad where she was partnered with Jake. She was the first female modified human shown within the series as well as one of the two main antagonists of Volume 01. Mary was very intelligent, always strictly followed her missions, and was loyal to Dr. Crombel. She rarely displayed emotion and was usually taciturn, which frequently irritated Jake, her partner. Although she was often overshadowed by Jake's frequently outrageous actions due to her stoic, avoid-trouble-if-possible disposition, she had a very cold and contemptuous nature, and harbored arrogant superiority complex toward M-21 and 24, seeing them as unworthy "trash".