Yuki is the youngest sister of Kiminari, so that's why she's more cute than beautiful... and she's got that younger sister pose. Yuki I believe means snow in Japanese. Again, name froma babynames book.

Yuki and art © Bridget Spencer

This is an old piece (05) and is the second of an ongoing series of demon sisters. Yuki is the youngest. you can see the first one here: http://www.furaffinity.net/view/510836/