Nuo Er suffered from a memory loss before she first met Wulin. Wulin's family took her in and raised her as an adopted daughter and a sister to Wulin until the day Nuo Er remembered her past and disappeared. She demonstrated no sign of Spirit Essence during her awakening ceremony.
She was quite shy and spoke very little upon meeting Wulin, but her affection for him grew relatively fast. Over the years they grow very close and she enjoys being pampered by him.