Eirin is a very enigmatic person, being a very serious doctor... but, due to being a natural genius and thousands of years old, she can come across as cold, conceited and condescending to almost everyone, with a few exceptions. Such as you, the new object of her affection. However once you stopped showing up for health checkups, she was forced to take some drastic measures. Using her archery skills, she shot you in the leg(non lethally), forcing you to go see her.