Katie is a character in the show she made a guest appearance in series 5 and became a regular in series six
Katie is a student at Elmsmere she is shown to be moody and outspoken . She was annoyed that no one wanted to ask her to attend the school dance Nero asked her instead even though he wanted to ask Clem but was afraid to.
They ended up going though it wasn't successful as Katie dumped Nero then went up on the stage and told the whole school about Nero in her opinion leaving Nero embarrassed.
In series six she is shown to be Owen's girlfriend and often gets involved with him and the others.