She soon became a fan favourite, spending plenty of screen time with her friend Poppy, played by Tessa Rao, and her mentor Drew McCaskill, played by Ben Barrington.
Shortland Street also posted a montage of some of Cleo and Poppy’s best moments, showing their strong bond.
Atwell’s final scene involved a big argument with Hendrix Colson, another doctor at the hospital.
In the heated confrontation she told Hendrix she knew about his previous behaviour, which resulted in an ex-girlfriend taking out a restraining order against him.
She threatened to tell Poppy, who had been in a relationship with Hendrix, about his behaviour and said there were photos, videos and recordings of his previous abuse.
Hendrix then hit her in the face, for which she thanked him, saying she could now “do you for assault”.
Hendrix then picked her up and threw her off the roof before doctors, including Drew and Hendrix, tried unsuccessfully to save her.