She's always been envious of his ears. The way they curve into such delicate tips makes her despise the bland roundness of her own ears. He doesn't understand her interest, but he never complains when she traces her way around the subtle contours; in fact, he seems to enjoy it. He constantly tells her that her ears are the intriguing ones, but when she catches him staring at her, and the greenish tint paints the tips of his ears, she disagrees with him completely.