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From Children of the Gods, page 27 : During the Second Republic, some wealthy humans underwent special cosmetic surgery to give themselves vaguely Obun features, and thus appear "exotic and alien." Even when the Obun-vogue rage dissipated in the Dark Ages, there was still a cosmetic appeal...

Third and last hint :

QUESTION : What is Lady Biancha Decados famous for ?
HINT #1 : She was famous during the Second Republic.
HINT #2 : She underwent several surgeries.
HINT #3 : She was a "he" before these surgeries.

No, she didn't.

A second hint :

QUESTION : What is Lady Biancha Decados famous for ?
HINT #1 : She was famous during the Second Republic.
HINT #2 : She underwent several surgeries.

A first hint to help you :

QUESTION : What is Lady Biancha Decados famous for ?
HINT #1 : She was famous during the Second Republic.

Nobody ?

I'll give you a first hint in a few hours if no one finds the answer.

I think I recently read something like this in "Children of the Gods".
Isn't it on Ukar ? Or whatever the Ur-Ukar's home planet is called by the Humans.