Sayaka Kirasaka De Strike The Blood

She grew up just like Yukina Himeragi in the Lion King Association, she is Yukina's only friend, over time they separated due to missions, in one of them is where she meets Yukina Himeragi again and meets Kojou.

Sayaka: you are kojou akatsuki right

Sayaka is very overprotective of Yukina and at first doesn't get along with Kojou Akatsuki saying that it was Kojou's fault that Himeragi was exposed to danger. She has a severe fear of men (serious enough to refuse calls from her superiors just because they were men). However, she later found out that Kojou is one of the few men she felt comfortable with. Also, after letting Kojou drink her blood, she started to fall in love with him.