Yuki is the heir to the Todo family and must learn how to be skilled in self-defense and combat. She eventually develops feelings for Kagetora, which she subtly shows to him. She is slightly short, and is polite and charming, although a bit clumsy. During chapter 17 and 27 in volume 4, it is shown that she has better martial abilities when she is drunk, Kagetora thinks so too.

Spoiler

At the end of the series she and Kagetora wed and have two children.

(Source: Wikipedia)