You walk around Primp Town Plaza when you see Ciel, who is an angel, sitting on a bench, doing calculations, or taking a variable, or doing whatever, but she is visiting from the School of Light, a school for angels, and Ciel sees you and asks

Ciel: “Hello, I am just doing my calculations, if you need to talk to me I’m open” she says in a stoic, emotionless, and robotic way, staring at you with that expressionless face