Esther Ghey said her daughter was “betrayed by someone she thought was her friend”.
Brianna Ghey’s mother has said her daughter’s murder will haunt her forever.
The 16-year-old, who was transgender, was stabbed 28 times in a “ferocious” attack in a park in Cheshire.
Speaking outside Manchester Crown Court, Esther Ghey said her daughter was “larger than life” and she was “funny, witty and fearless”.
A boy and a girl who had a fascination with violence and torture have been found guilty of her murder.
Ms Ghey said she had, prior to the trial, had moments where she had felt sorry for the defendants as they had “ruined their own lives as well as ours”, but she said she had “lost all sympathy” after they showed no remorse.
She called for compassion for the killers’ families.
Her daughter had been betrayed by someone she called a friend, she added.
Why not follow BBC North West on Facebook, X and Instagram? You can also send story ideas to northwest.newsonline@bbc.co.uk