Talk:S I N/@comment-33844581-20181124032431/@comment-1441037-20181124133730

Nasu already explained in his blog this is Fate's Sion with a different upbringing (Zepia never went mad or TATARI so he acted as a father figure for her), so of course she is different to Tsukihime's Sion (that had a far more problematic life).