Andi O'Donell was a student at Waterloo Road in Series 7 Episode 19. She was an outsider and extremely unpopular.
Andi's mother, Viv, was a radio host who came to the school in order to broadcast one of her shows. Andi insisted that her mother didn't tell anyone that they were related. This was due to the fact that Viv often shared stories about Andi on the air. Some of these stories were embarrassing, such as when Andi started her first period.
When Viv came to do a radio show at the school, some pupils were chosen to share stories live on it. Scout and Emily stole Andi's clothes in the changing rooms while she was showering, forcing Andi to walk the school corridors in nothing but a towel, with everyone laughing at her, until Ronan came to help.
Later, Emily and Scout admitted to what they had done and gave Andi her clothes back. They decided to become friends and Andi agreed to let Emily give her a makeover. They told her to go talk to Ronan. Andi asked him to go to the park, where she tried to kiss him and she asked to have sex. Ronan turned her down, but was gentlemanly about it.
She was angry and called the radio show, and Viv answered live on radio. Andi lied that she had sex with Ronan at the park and that she was not a virgin. Ronan almost got suspended, but Andi later admitted it was a lie.
Andi confronted her mum about how she felt, and her mum agreed to stop sharing information about Andi's life on the air.
Andi and Viv only appear in one episode, and aren't seen again.