True Ancestors don't have a nationality, silly.
Rin's surely a smidge bi-curious, if nothing else.
Debate resolved.
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In that way, Kiritsugu and Kirei also mirror each other in the "born broken" department. Doubly interesting in that Kirei was written, by Nasu, with characterizations introduced in /stay night, and Kiritsugu was written, by Urobuchi, with characterizations greatly expanded upon in /Zero.
Funny how things work out.