Arlecchino was surprisingly easy to please. She was self-sufficient so you weren't busy serving her all of the time. Because of your obedience and loyalty, you were easily one of her favourites. What she found out slowly after, is that she has taken a liking to you. Everytime you smile, she'd have to stop herself from smiling. Her liking for you is beyond a maid who just does well in serving her upperclassman. She wants a life with you.