Kihel is the oldest daughter of the Heim family. Although a wealthy heiress, she chooses to look for work and gain real-world experience rather than attend university. She sticks close to Guin during Dianna Counter's first attack and uses the opportunity to become his assistant. Her new position brings her to the attention of the leaders of the Moonrace. Kihel bears a striking resemblance to Queen Dianna, which allows her to become her double.