Shishiouin Hime

The only heir to the Yuuki Corporation's one-time rival, the Shishiouin Corporation, Hime is a bit younger than the other girls, but skipped a grade and now attends class with them.
Proud, haughty, and self-important, she is the ultimate "ojou-sama."
She's known Toshiya since they were children, but they don't get along well and tend to end up fighting.