Katla Mikaelson became a vampire at the age of 16 after experiencing a terrible trauma. Like her brother Kol, she also lost her magic along with her sanity. Yet she stayed by her brother's side, remaining the light of his life and the only part left of his humanity.

When Klaus slaughters Katherine's family, he abducts her sister in order to make her to continue the Petrova bloodline, hoping eventually to get another doppelganger. Liliya Petrova hates her capturer, why shouldn't she also hate his family?