Newborn

A newborn is a vampire that has just been turned.

Personality
They are often blood-thirsty and violent. A newborn's emotions are hard to control and they anger easily. Bella Swan was one exception to this rule, as she had time to think about her decision and therefore did not have the first brutal year that most vampires encounter.

Physical Description
Another easily recognizable trait of a newborn is the eyes. All newborns' eyes start off as crimson red because of all the human blood (their own) inside their bodies. This blood also makes newborns incredibly strong. Human blood is what makes vampires so strong, so when a vampire is completely saturated with it, they are extremely strong.

History
This strength can be manipulated easily. A vampire named Benito originally invented the idea of creating a newborn army. With a large group of vampires fighting together, they were hard to stop. This basically set off the entire vampire wars of the south and had devastating carnage as a result. A newborn army appeared in Eclipse when Victoria created one to kill the Cullen Family that devastated Seattle.