Her parents and two younger sisters said they are filled with "immense grief and deep sorrow" at the confirmation of her death.
"It is impossible to describe the excruciating pain that we have felt as we have waited for news from the authorities. But we are comforted by the knowledge that our daughter has been found and identified," her family said in a statement.
"Sharidyn was a courageous young lady who took every challenge with ease. One of her strongest qualities was her ability to care for others. She was a proud big sister to her two younger sisters, and she loved to care for them as a big sister.
Sharidyn had been a member of the party for around a year and her trip to Utoya Island with the group was her first.
"From telephone conversations and a constant flow of text messages in the days leading up to her death, we know that she loved being together with her friends on the island which is why it is difficult to comprehend that her life ended so tragically.
It is impossible to describe the excruciating pain that we have felt as we have waited for news from the authorities. But we are comforted by the knowledge that our daughter has been found and identified."
A Facebook page been set up in honour of Sharidyn.
- Herald Online, NZPA