charlotte Petrova is the first Petrova Doppelganger. Her doppelganger is Katherine, and Katherine's doppelganger is Elena. It seems she is a vampire, born somewhere around 1200 and turned around 1220.

Trivia
charlotte may have been born between the years 1182 and 1183.
If she continues to exist, she would have an age of 827 to 828 years old, making her the strongest non-original vampire on the series.
When charlotte was turned, she must have been 17 to 18 years old.
She will be the third character that Nina Dobrev will be playing, when she does appear in the series.
She could appear in "Know Thy Enemy".
She was used when the curse began, madami than 600 years.