Sayori Wakaba (若葉沙頼, Wakaba Sayori?) Yuki's dorm-mate and best friend since junior high, Yuki often refers to her as Yori-chan. Yori seems to be one of the few girls who is not interested in the Night Class. She finds them a bit scary and stated that she would prefer someone from the day class. Yori is also very observant, as she notices a lot of things that happen to Yuki, especially when she gets hurt or is very depressed. She helps Yuki a lot. Later in the story, Yori finds out that Yuki is a vampire after Aidou protected her from a Level E vampire, who served Rido. Despite that fact, Yori still accepts Yuki and appeared to be more worried over that fact that she would lose her best friend.