Earlier this week, the girl was ordered to stand trial as an adult. The girl's bail is set at $2 million.
The teenager is charged, along with another 14-year-old girl, of rushing the victim at her Escondido home May 3. Both girls face up to life in prison if convicted.
The defendants allegedly beat and kicked the Hidden Valley Middle School eighth-grader, then carved her face and back and stabbed her five times.
The girl in court Thursday is alleged to have planned and executed the attack, the paper reported. Authorities say she donned two layers of clothing, including a jacket with a hood to cover her face, then attacked the victim at her front door, pushing her into the living room, then into her bedroom.
After the attack, the victim was told to shower off the blood, authorities said.
The victim nearly died and continues to struggle with medical issues.
Read more: North County Times.