The following is a list of major characters in the Xenosaga series.
After Xenosaga I, all the character models were redesigned for Xenosaga II. While there is dispute about which character models were altered the most, they were all radically altered. MOMO's and Jr.'s designs became "...taller, slimmer and less child-like" and visual novel-style dialogue sequences.
Shion Uzuki is the main character of the three episodes of Xenosaga, which have been referred to as "Shion's Arc" by Namco Bandai. While her role is less prominent in Xenosaga Episode II, which focuses on the character Jr., she is the lead character again in the DS remake Xenosaga I & II. While Shion's surname is "Uzuki", Takahashi has stated that she is not meant to be a distant relative of the character Citan Uzuki from Xenogears. She does, however, share his liking for science.
Shion is portrayed as a girl who tries to overcome the tragic events of her past by "looking away from reality and truth". Takahashi compared the character's instinctive tendency to run away from things with his very own personality and mindset. A particular point he wanted to explore in the series was Shion "looking back at herself […] wondering how she should live her life". When he created Xenosaga, Takahashi made "life and death" a central theme of the story and gave each character a different outlook on it; Shion and Albedo were conceived as the two characters that eventually develop the "ideal compromise towards death".
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Official Site: Namco
Links: KOS-MOS' Wiki Article Xenosaga Fansite Official Site