Hyung-Jun is a doctor in the Granvia airbase, formerly an ace pilot of the Korean unit, she became a senior ranking fly-girl as she shot down hundreds of alien space crafts, her nickname was the "Thunder-Cat". But due to some injuries, Hyung-Jun retired herself at the age of 26 and is currently serving as the doctor, she is soft spoken by nature and often get carried away while reminiscing her past days