|Age||About 12 in Tunnels of Blood, 25 in later books|
|Relatives||Jesse Hemlock (father) Donna Hemlock (mother)|
|Book Universe||The Saga of Darren Shan|
|First Book Appearance||Tunnels of Blood|
Debbie Hemlock is a girl that Darren Shan meets when he is traveling in Larten Crepsley's hometown, in Tunnels of Blood. They meet downtown, later that evening she invites him to spend Christmas with her family. Darren said that he would but ends up luring Murlough into a trap involving Debbie and her family and Larten kills Murlough.
She later appears as a school teacher in "Allies of the Night", 13 years later, making her about 25. She finds out about vampires and how Darren and his "father", Mr. Crepsley, are a pair of them.
Later on in the series, Debbie joins the vampires, but stays human, using guns and other weapons vampires and others that have been blooded can't. She and an ex-police officer Alice Burgess start the vampires' version of Vampets, the Vampirites.
Although still attracted to Darren from their past relationship, Debbie initially turns down his attempt to restart their relationship due to him still being a teenager in terms of physical appearance. However, when he begins to experience 'the purge' and grow older, Debbie suggests that they could restart their relationship once he has stabilized as an adult, but Darren sacrifices himself to stop Steve before they can take this any further.
Debbie is described as being a pretty, short, joyful girl with dark hair and skin.
- Debbie's character does not appear in the movie Cirque Du Freak: The Vampire's Assistant though Rebecca might be a version of Debbie because Darren had a love interest in both girls.