Drusilla was born to Andrew and Eleanor Blackthorn in 1999. Drusilla is the sixth of seven children and thus has five older siblings: Helen, Mark, Jules, Livvy, and Ty, and one younger brother, Tavvy.
When Sebastian Morgenstern and his army of Endarkened invaded the Los Angeles Institute, she was at the nursery with Tavvy. Frightened by the noise and fire coming from outside, she got hold of a sword and determinedly protected him until Emma Carstairs came to get them. By the foyer, Emma stayed and let Dru carry Tavvy and go to the office ahead of her. They got there in time and were Portaled into Alicante.
After the raid, Dru and Tavvy were both very uncomfortable and had nightmares. Despite only being eight, Dru was also interrogated with the Mortal Sword, a tool used to painfully compel the truth out of a person. She and her siblings suffered through a lot during the Dark War, made worse by the loss of Andrew, who was Endarkened and killed afterwards, Mark, who joined the Wild Hunt, and Helen, who was exiled to Wrangel Island. Eventually, the family was sent back to the Institute, where they were to be raised by their uncle, Arthur. Diana Wrayburn soon arrived and became their tutor.
At one point, Dru became obsessed with detectives, much like her older brother Ty—unlike him, however, Dru got over the phase. She read Nancy Drew books Emma got from a junk shop, citing them as good adventure stories that were nice to read about because it didn't have any demons.
In 2012, the Blackthorns visited their great-aunt Marjorie in England. During their stay there, Marjorie told her that if she wasn't "such a butterball," she would be pretty and boys would do whatever she wanted. Emma was horrified to hear about this and told her that she was truly beautiful, regardless of her shape.
The family returned to L.A. in August, after about two months with their aunt. Upon their arrival, they were introduced to Cristina Rosales, who was staying at the Institute for her travel year.
When the Blackthorns began their investigations on the Guardian, Dru helped with Livvy and Ty through research within the Institute. She was often left to take care of Tavvy or to keep him from hearing the gory details of their missions. When Cristina's ex Diego arrived at the Institute, Dru developed a crush on him.
Dru was at the beach with Tavvy when the others realized that their trusted High Warlock Malcolm Fade was the Guardian, so when Malcolm arrived telling her that she was needed by Julian at the Institute, and to leave Tavvy with him, she trusted him and ran off, accepting a letter from Malcolm meant for Julian. When she arrived, Dru and the others realized that Malcolm now had the Blackthorn he needed to sacrifice for his ritual. Dru broke down and wept when she realized what she had unwittingly done.
Dru protested when the possibility of her staying at the Institute while they went after Malcolm to rescue Tavvy came up, and Julian—acknowledging that Dru was the same age as him and and Emma when they fought during the Dark War—agreed to let her come, so long as she stayed behind them and stuck close to the others. There, they found Diana, and together, they all confronted Malcolm and interrupted the ritual, saving Tavvy.
When Diana was incapacitated during the battle, Dru rushed to her in an attempt to help her and ended up killing an undead Follower—her first ever kill. When Malcolm went for Ty and Livvy in an attempt to get a new sacrifice, Dru got in his way. Malcolm turned his attention to her and used his magic to knock her off her feet. Emma drew him away, allowing Dru to escape.
A few weeks after the battle, Malcolm appeared at the Institute with a horde of sea demons, having partially resurrected himself with a spell from the Black Volume of the Dead. He threatened the residents and the visiting Centurions, telling them to provide him with Blackthorn blood once again and gave them a deadline before leaving and setting the demons upon them. Dru, on Arthur and Diana's orders, Portaled to the London Institute with her siblings during the battle, leaving the Centurions to face the demons.
While in London, Dru became frustrated about being left behind to babysit Tavvy, feeling dismissed and neglected in terms of being a Shadowhunter. Brooding in the parlor, she was shocked to find a boy, who she later recognized from Cristina's stories as Jaime Rosales, hiding. Jaime went on to tell Dru that he needed to see Cristina but couldn't be seen just yet. Pleased that someone trusted her enough to confide in her, Dru hid him in her room and brought food up to him. She enjoyed keeping him a secret from her siblings as it made her feel important, and needed by Jaime. The two bonded, and Dru soon became attracted to Jaime; Dru realized that Jaime thought they were around the same age—sixteen—and was unable to bring herself to correct him and tell him that she was only thirteen.
When Jaime thought the time was right, he had Dru fetch Cristina so they could meet. She was disappointed and sad when Cristina came back to her afterwards and told her that Jaime was gone, though she promised to keep Dru informed of what happened to him.
Back in her room, Dru was surprised to find Jaime's duffel bag still under her bed. Inside, she found a glowing object and, after touching it, found herself in a strange underground room, not realizing that she was in Unseelie territory. After exploring a bit, Dru came across a boy called Ash who mistook her for someone sent to help him. Before she could learn anything else, she was brought back to her room in the Institute.
Personality and traits
Drusilla is quite shy and often feels self-conscious about her body.
Dru has the Blackthorns' signature dark brown hair and blue-green eyes. She is quite tall for her age—nearly the same height as Cristina, despite being five years younger than her. As a child, she was already compact, expected to grow to be curvy unlike her mostly lanky siblings. Her body has since already gone through puberty early, showing off her curves to the point where Dru, at thirteen, has been mistaken for seventeen or eighteen years old by mundane boys. This has made her very self-conscious about her body because unlike most Shadowhunters who are wiry or muscular, she is round-bodied and doesn't fit into the gear designed for girls in her age group. She often wears her hair in two braids.
- City of Lost Souls (alluded to)
- City of Heavenly Fire (first appearance)
- Bitter of Tongue
- A History of Notable Shadowhunters & Denizens of the Downworld
- Lady Midnight
- Lord of Shadows
- Queen of Air and Darkness (will appear)
- The Wicked Powers (will appear)
Following the family tradition of Greek, and Latin, names, Andrew named her Drusilla after Caligula's sister.
- Dru is very competitive.
- Dru is an avid reader, and she likes horror movies, especially any with the words "blood," "terror," or "prom" in it. In fact, her room has books about serial killers and slasher films scattered across the floor; the walls are black, and vintage horror posters cover the windows.
- Dru will be one of the main characters of The Wicked Powers, alongside Ty and Kit.
- ↑ 1.0 1.1 City of Heavenly Fire
- ↑ 2.0 2.1 2.2 2.3 2.4 Lady Midnight
- ↑ A History of Notable Shadowhunters & Denizens of the Downworld
- ↑ 4.0 4.1 4.2 Lord of Shadows
- ↑ The Blackthorns' Roman names — Cassandra Clare on Tumblr
- ↑ "No, Dru is the reader." Cassandra Clare on Twitter
- ↑ "She's a bookworm." Cassandra Clare on Twitter
- ↑ "Dru is the big reader." Cassandra Clare on Twitter
- ↑ "She likes horror movies." Cassandra Clare on Twitter
- ↑ https://twitter.com/fangirlishness/status/871406868824039426