Dor
Dor is the inventor of the first clock and decided that time needed to be measured. However, this led to his punishment by God and he was exiled into a cave. Dor spent the next few thousand years listening to those who feared time. When his punishment has ended, he is given the power to stop time and goes back to Earth to help others to appreciate time.
Sarah Lemon
Sarah is a young teenager who is part of a broken family. She lives with her divorced mom and rarely sees her dad, which in addition to insecurity about her body weight leads her her to depression. One of the only happy parts of her life is seeing Ethan, a boy at the volunteer food pantry whom she has a crush on. However, she discovers that Ethan only flirted with her to use her sexually after being humiliating by him, pushing her to attempt suicide. Father Time showed her that she would devastate her loved ones through her death and decided to continue living.
In the end, Sarah finds a cure to cancer and lives a successful life, thanks to financial support from Victor.
Victor Delamonte
He is an old wealthy man suffering from a terminal metastatic cancer. His kidneys begin to fail and this urges him to try to cheat death via cryonic freezing. Originally, he planned to dupe his wife and get his body frozen when she is at a New Year's party. However, Dor shows him the future: Victor would be successfully revived, but kept as a exhibit in a museum to show visitors what life was like in the 21st century. As such, he decided to not freeze himself and make use of time with his wife.
Ethan
He is Sarah's crush and feigns interest in her so that he could use her physically. He repeatedly asks Sarah on dates then cancels on her. He is shown to be very cruel by laughing about Sarah to his friends and humiliating her on social media, which eventually causes Sarah so much distraught that she tries to kill herself.