Mary Godwin, like her sister Shelly, were the prisoners of a pharmaceutical company to be used to test drugs until their rescue by the Kukai Foundation. Unlike Shelly, Mary is a fun-loving individual. She is also the second-in-command of the Kukai Foundations' dreadnought Durandal, and is also well versed in strategy.

A word of note: the names of the sisters, Mary and Shelly Godwin, is inspired by Mary Wollstonecraft Shelly, the author of "Frankenstein".

(source: Absolute Anime)