The young person appealed her convictions and sentence for assault and aggravated assault.
The victim suffered significant injuries, including broken bones of the eye socket and bleeding around the brain.
The appellant argued the trial judge failed to properly consider sentencing options under the Youth Criminal Justice Act.
The Court of Appeal dismissed the appeal, finding the trial judge properly considered alternatives to custody and the various custodial gradations, concluding that a sentence of real custody was proportionate to the seriousness of the violent offence.