R enesmee "Nessie" Carlie Cullen

Renesmee is the half-vampire, half-human daughter of Edward Cullen and Bella Swan. Nessie was born on September 10, 2006, which was the same day as Bella's human death in the book, Breaking Dawn. Her name is derived from the amalgamation of the names of Bella's mother, Renée, and Edward's adoptive mother, Esme. Her middle name, Carlie, is a combination of the names Carlisle, Edward's adoptive father, and Charlie, Bella's father. She has the same facial features and hair color as Edward, but the curly hair of her grandfather, Charlie Swan, and the brown eyes of Bella. Jacob Black gave her the nickname "Nessie" because he considers her full name to be a mouthful, though Bella dislikes him naming her "after the Loch Ness Monster". However, by the end of the book, all of the characters have adopted this shortened version. She has pale skin that glows instead of sparkles in the sunlight. Her heart pumps blood, giving her a blush. Renesmee can survive on both blood or human food, but prefers human blood. She does not have venom. Her special abilities are that she is able to send someone a memory by touching their skin, and she can break any shield, mental or otherwise. Renesmee grows at a fast rate, being able to speak only seven days after her birth, and by the end of Breaking Dawn she is able to read, run, hunt, and perform other tasks. She will reach physical maturity after about seven years, when her physical appearance is around seventeen, and will then stop aging.

After Jacob Black imprints on Renesmee, Irina, a vampire from another coven, sees Renesmee and believes she is an "immortal child", a child who had been bitten by a vampire. She informs the Volturi, as immortal children are not allowed to live. Intent on killing Renesmee, the Volturi travel to Forks. However, the Cullen family gathers witnesses from around the world to prove that Renesmee is not an immortal child. Alice brings another half-breed, Nahuel, who explains what he is. No longer seeing Renesmee as a threat, the Volturi leave.

From: Wikipedia