Da Tiantian is the Head Nurse of the Meng Academy infirmary. She is kind and caring but becomes flustered easily. She uses a doll named Li Ka, with her own voice, to attract students to the school. She treats Rui Bu Si for malnutrition and injuries. She tries to maintain order in the infirmary. She gets nervous when students mention Li Ka. She is a motherly figure who helps new students adjust. She has a sweet voice and a good heart.