t started with Tatia, then pasted down to Katerina, then to Elena. In the Petrova family book, it says their line ended with Katerina, but now there's Elena. Yet, she isn't the only one. Katerina had a sister, they looked similar. No not the same, her sister isn't a doppelganger, but the only difference, other than personality,is eyes. Katerina has brown eyes, while her sister has stunning grey eyes, that look as if its liquid metallic silver. It is absolutely stunning, beautiful, breathtaking. Follow the journey of Mystic Falls.