Kaede would hit or throw an object at Shirou if she saw him being too friendly with another girl. That goes for Shirou too, he would be a little aggressive in protecting Kaede from other guys in class or in public.

Each time they're near each other they get a little nervous. Usually Shirou is the more confident one as Kaede is the more shy.

They've been having feelings for each other as long as you remember being friends with them. It's getting annoying that they haven't gotten together for yo