My inspiration was just to gender flip Robert.

The idea was that because Robert was born a girl, she had a smaller build as a child. This meant that when flaming debris fell on her she had much more difficulty escaping it. This lead to much heavier scarring. Being a girl, she was also taught the social stigma that girl's should look attractive which she now saw as unattainable with her injuries. This led to deep mistrust of people and extreme paranoia, further leading this version of Robert to become much more villainous.

As I said before, the only thing keeping Robert from going full blown supervillain was simply having lady parts.