She is a princess of the kingdom of Austria and is the only daughter of the royal couple. She has an authoritarian and arrogant personality.

Glamorous Paris, entrancing Venice, romantic Rome and irresistible Vienna... These alluring cities of enchantment invite you to witness the story of a young girl who unexpectedly becomes entangled in daring adventures and rollicking romance.<br>
Vienna, 1907. Princess Flora, the one and only idol of the entire nation, is celebrating her birthday. Flora is young, beautiful, single and the object of all the men`s desire.<br>
(Source: AniDB)

[Wiki (jp)](https://ja.wikipedia.org/wiki/白石冬美)