|Portrayed by||Lucien Laviscount|
|First Appearance||Series 6 Episode 1|
|Last Appearance||Series 6 Episode 20|
|Parents|| Marcus Kirby |
When Jonah first arrived at Waterloo Road he had been chafing under the restrictive bonds of home-schooling for some time. Home-schooled by doting parents who accept him for who he is, Jonah is authentic and comfortable in his own skin. Jonah wanted to stay at Waterloo Road but his sister Ruth Kirby didnt want to. In the first episode he arrived in Ruth ran away and Jonah helped look for her because he loved his sister and cared for her a lot. When Ruth was found Jonah told his dad talking to girls and having mates mattered to him so he wanted to stay in Waterloo Road and not be different to all the other students. Sooner he formed a bond with Jess Fisher and then they became a couple. Three episodes later he realised that Jess had an affair with Chris Mead and he then assulted Chris and didn't tell the Head Karen Fisher why because otherwise it would spill the secret of Chris and Jess's one night stand. Jonah then broke up with Jess because she kept secrets from him and he couldn't trust her anymore.
When Jonah finds himself comforting Francesca Montoya after a brutal dog attack at the start of term it sparks a secret love affair. For Jonah she is the perfect woman, funny, kind, beautiful, and he quickly falls head over heels in love with her. Their relationship became even more serious once "Cesca" found out she was pregnant and the couple ran away to Gretna Green to get married. As they leave the registry office they are greeted by the police which Cesca is arrested, but Jonah and Cesca are happy because at least they got to marry each other.