Ruka Souen

Ruka Souen (早園瑠佳, Sōuen Ruka?) is a Night Class student popular among the Day Class boys and one of the most faithful and protective of Kaname Kuran's followers.

Personality
Ruka usually reflects a haughty, bored and uniterested persona to the rest of the world, probably due to her noble upbringing. One of her defining characteristics is her love for Kaname Kuran. Since they were children, Ruka has been tied by loyalty and admiration for him, angry at all those who disrespect him and disdainful of all girls who fawn on him. Her possessiveness made her hot-tempered and jealous, but her love for Kaname also brought out a vulnerable, self-doubting aspect of her usually proud personality, which she only expressed to her close friend Akatsuki Kain. She realized how overzealous and how she was only thinking of her own feelings and matured. Since giving up on him, she has shown a gentler side to her personality. She even gave Yuki, whom she was jealous of before, etiquette lessons and during the ball, told her that she was glad Yuki and Kaname were getting along so well.

Although Kain has been in love with her since they were children, she appears to be oblivious to his feelings for her.

Appearance
Ruka is slim, with a pale complexion. She is elegant, and very ladylike. She has the same ethereal beauty that the rest of her race possesses, with delicate features and light eyes that are a dusky-rose color. She has wavy dark peach-orange colored hair that falls to her waist. Her height is 175cm.

Background
Ruka grew up privileged, as the daughter of a noble family. Her family is part of what is referred to by Asato Ichijo as the "Aido faction", which is comprises of the Kain, Aido, Souen, Toya, and other clans. Not much is known about her parentage, but her father or mother is possibly part of the Senate or in another high position, as Ichio refers to her as "The daughter of Souen". Ruka came to Cross Academy to be closer to her long-time idol, Kaname Kuran, with whom she is "in love" with. On their first night at the school, she asked Kaname to drink her blood to prevent him from drinking Yuki's blood, but he has since refused it, which deeply hurts her, even though she had expected him to refuse her blood.

Plot Summary
She becomes upset with the fact that Kaname chose Yuki to be his lover, but finally accepts Yuki when she discovers Yuki is Kaname's pureblood sister. She even gives Aido shoes to give to Yuki to wear. She seems much more mature and level-headed now, recognizing the foolishness of her obsessive feelings for Kaname, though she still shows just as much dedication to him as before but with a new calmness. When Rido Kuran's servants invaded Cross Academy and attempted to attack the Day Class students and present them as gifts to their Master, Ruka alongside Kain, worked to defend the Day Class girls. Following the breakup of the Night Class, she, Aido, and Kain returned home to see their families for a little while, because they did not know where he had disappeared to and decided that they would search for Kaname and Yuki after their short visit.

Following the one year timeskip, Ruka has been aiding Aido in training Yuki in order to turn her into a lady.

Trivia

 * Her given name is composed of ru meaning lapis lazuli and ka meaning good-looking or beautiful. Her surname is composed of sou meaning early or the obscure meaning of strong fragrance and en meaning garden.
 * She is roommates with Rima Toya.
 * In the anime, she possesses the ability of mind control. In the manga, her powers have not been shown yet.
 * The Souen family are pro-monarchy like the Aido, Kain, and Toya families.
 * The official spelling of Ruka's name is Luca, as published by the official Vampire Knight fanbook Japanese release.