北御門 律子

Ritsuko is a 1st year student in Final Course. Her title, ”Belle Epine,” means ”Beautiful Briar Rose.” It refers to both her great beauty and her aura of unapproachability. She is the younger sister of Ayaka, but unlike her sister, a person who tries to follow the rules, being brought up as the "good girl" of their family. She becomes the leader of the Red Roses as Mitsuki and Marika believe that she has more influence over the students.

Normally, 2nd year students are asked to head up the societies, but this year, it was Ritsuko who was chosen... This causes her great discomfort. She dislikes breaking rules and traditions. She is also violently opposed to reform - not because she hates men, but because she views it as a violation of tradition.

She herself neither likes nor dislikes boys. She simply doesn’t consider them relevant to her. But as head of the Red Roses, she will fight to keep Vincennes the way it is.

”I will not accept. Neither changes to the school, nor you.”