She was so disliked in Primary 5 that her classmates started a petition asking students not to speak to her.
Cheryl Yeo, now 16, was befuddled, as she had no idea what she had done to deserve that treatment.
Her isolation continued on in Primary 6, and she was shunned by even her closest friends.
She will be among the hundreds of young people who will be participating in Break The Silence tomorrow.
Organised by non-profit group Higher Productions, the musical parade on Orchard Road aims to increase public awareness about bullying and encourage more youth to speak out.