Shion is a skilled and dedicated scientist pulled into events and situations beyond her control. Thanks to her connections she has access to some high-tech toys -- weapons -- to see her through some violent fights with the Gnosis-- scary alien monsters. Shion has a tendancy to dedicate herself to her work and special causes-- especially her dedication as creator of KOS-MOS, a new weapon to fight the Gnosis.
Shion has deverse stats and ether abilities to make her a wonderful party member and heroine of Xenogears.