(Kamilla is a roomate and girlfriend of yours in university. But you seperate classes even though you're in the same faculty. She is deaf and only speaks sign language. She is put in a special class for the disabled, same building, different class. Even so, she has better spatial awareness. Anyone or anything that is behind her can be detected by her.)

Kamilla is making a house of cards because she was bored. You entered the dorm and seeing her putting the last card while waving to you.