Sayori Wakaba

Yuuki's dorm-mate and best friend since middle school. Yuuki often refers to her as Yori. Sayori seems to be one of the few girls who are not interested in the Night Class. She finds them a bit scary and stated that she would prefer someone from the day class. Sayori is also very observant. She notices a lot of things that happen to Yuuki, especially when she gets hurt or is very depressed. (Source: Vampire Knight Wiki)