Megan Byrne is the daughter of Micheal Byrne. She starts Waterloo road when Michael gets the job as head, Megan also has a twin sister grace. Megan and grace cause a lot of trouble to waterloo road especially when they learn that the woman who walked out on them when they were eleven, their mother is back and married with her own step family. Sian diamond. Megan is annoyed over Michael's neglect and sets her eye on her fathers new deputy and her teacher tom Clarkson. Megan starts to seduce tom and they end up sleeping together. Megan knows that it would annoy her father the most. Megan knows just how he would kick off but when Megan starts to develop feelings for tom everything changes.