Doctor Nital is from the country Kakistia. She helped develop a nuclear weapon for her county to make them a nuclear power.
 
The testing was successful, but it enraged Firelord. He attacked the military installation in which the doctor worked. She eventually ran to meet Firelord to be punished for her crime. Instead of killing her, he gave her the vision of what a horrible thing she had done. It left her in despair.