Sherry Tueli

Sherry is the 12-year-old daughter of the Tyueri family, a noble family related to Marquess Casel, an influential senator.

[Spoiler] Wanting to improve his connections to Casel, Sugawara offered to have a pearl necklace delivered to Sherry following a party. Following this gift, Sherry fell in love with Sugawara, and attempted to pursue him whenever he was near. She quickly demonstrates a wisdom beyond her years, not only learning Japanese on her own, but also showing a keen understanding of the awkward interactions between Japan and the people of the Empire, as well as the problems this would pose to Japan and her "future husband"; for this reason, she eagerly offers to aid Sugawara and help bridge the gap between their nations. [/Spoiler]

(Source: Wikipedia)