Yuki was the first character designed and the first to have her personality defined, though with the intention of maturing later and being further defined. Matsuri Hino wanted to create a character different from her previous main character Airi from MeruPeri, she described Yuki as the character who possesses her justice side and that Yuki has the forgiving and nurturing nature that she wants. Amongst dark and gloomy characters, Yuki is meant to be the healing and soothing character.
Yūki is a combination of yū, meaning "tender" or "kind", and ki, meaning "princess". Interestingly enough another meaning of yūki ( 勇気, yūki) is "courage", whereas Yuki can also mean (雪, yuki) "snow" as well.
Officially romanized as "Yuki" in Viz media publications and Chuang yi publications. Fan translations more accurately use "Yuuki" as the romanji.
Kurosu is the Japanese pronounciation of the English word "cross." However, the kanji has a different meaning, kuro meas "black" and su means "master": "black master."
The kanji of Kuran, is a combination of the old fashioned way of writing ku, meaning "nine," and ran, meaning "orchid": "nine orchids".
Kaien Cross knew Yuki's name beforehand. He says to Yuki that Kaname told him that all girls are princesses and thus will name her Yuki and she is Kaien's 'tender princess.'