Tiberius Blackthorn is a Shadowhunter from the Los Angeles Institute. He is the son of Andrew and Eleanor Blackthorn and the brother to six siblings.


Early life

Tiberius was born to Andrew and Eleanor Blackthorn in 1997, the fifth of seven children, having been born a few minutes after his twin sister, Livia.[1][2][3][4]

In November 2007, Ty visited the New York Institute with his family. According to Jules, he and Livvy were eating wax, much to the exasperation of their older sister, Helen.

Dark War

Shortly after, the Blackthorns fell victim to one of Sebastian's plots. Sebastian attacked the Institute, Turning those they could into Endarkened to add to his army. Ty and the other children were able to escape to Idris through a Portal opened by the Clave for them, though their father was Turned and their half-brother Mark was captured. Shortly after they arrived, the children were interrogated with the Mortal Sword, which is a very painful process.

During the battle during which the Endarkened and Seelie faeries on Sebastian's side attacked Idris, the children were escorted by Brother Zachariah and Helen to the Accords Hall where they hid for the rest of the battle. Eventually, the Wild Hunt was able to get through the defenses and paved the way for the Endarkened to enter the Hall. Among the Endarkened was their father who then approached Ty; Ty was very trusting and did not attempt to move away. He could have hurt him so, in a panic, Jules killed their father. Ty witnessed the act firsthand and angrily hit Julian before Livvy stopped him, telling him that Jules had to do it.

After the war, it was decided that Helen would be exiled to Wrangel Island and Mark left to the Hunt. This left the children with no legal guardian, and Mrs. Sedgewick suggested that the children could be sent to the Shadowhunter Academy or to separate Institutes, until Jia Penhallow introduced Arthur Blackthorn, the children's uncle, as their guardian and the new head of the Los Angeles Institute. When Helen bid her goodbyes to Julian, she asked him to pay special attention to Ty.[5]

When Arthur introduced himself upon his arrival at the Institute, Ty did not look him in the eye. Livvy explained that Ty did not mean to be rude, Arthur has since dismissed Ty as weird and different.[6]

Cold Peace

In 2009, Ty was briefly reunited with his older half-sister Helen in a rare instance the Clave allowed Helen to return to Idris for her wedding to Aline Penhallow.[7]

At one point, Ty decided that he wanted to go to the Scholomance and become a Centurion, much to the dismay of his twin sister Livvy, who wanted to be his parabatai, and Julian, who feared what the Clave and the cruel Scholomance might do to him.

In the summer of 2012, Ty and his siblings visited their great-aunt Marjorie in England. He hid in the barn throughout the visit to avoid having to do chores and train. Shortly after they returned to Los Angeles, a party of faeries arrived and offered to return their brother Mark in exchange for help finding the culprit behind the recent murders.

Eager to get his brother back and prove his worth, he and Livvy actively helped in the investigation. Wanting to help out in the field, Ty once hid in the car Emma and Julian took to the home of Johnny Rook; when he noticed movement in the basement, he snuck into Rook's house and attacked the person lurking in the basement, whom they later discovered was Rook's son, Kit. Ty held a knife to Kit's throat until Johnny forced them to leave. Julian became furious at Ty for endangering himself, though Ty didn't understand the reason for Julian's anger.

Ty later accompanied his family to rescue Tavvy from the Guardian, who had been their family friend Malcolm Fade all along. When the death of Malcolm resulted in the death of Johnny Rook and thus Kit becoming orphaned, Kit was brought to the Institute where it was proven that he was a Shadowhunter. Ty sat and waited outside Kit's room while the latter came to terms with everything he just experienced and learned.

Over the next few weeks, Ty slept outside Kit's room. Ty and Livvy eavesdropped on the Los Angeles Institute's meeting with Clary Fairchild and Jace Herondale. Later, Ty and Livvy accompanied Kit during his training session with Jace. Ty gave Kit his first rune, an Iratze.[8]

Ty caught Kit trying to escape the Institute and managed to convince him to stay by telling him his plan to investigate the Centurions. This led Ty, Livvy, and Kit to track Zara Dearborn. They discovered her and Manuel's plot to take the institute from Arthur Blackthorn. When they went to alert Arthur, Diana was forced to reveal that Julian was running the Institute the entire time.

When the Los Angeles Institute was attacked by Malcolm Fade and his demons, Arthur saved Ty and Livvy by pushing them inside the Institute. This threat to their lives caused the Blackthorns and Kit to relocate to the London Institute.

Knowing that Herondales can see ghosts and that there were ghosts at the London Institute, Ty convinced Kit to get his Voyance rune and even drew it for him.

Ty, Kit, and Livvy later went to Blackthorn Hall and discovered an aletheia crystal. This led them to visit the London Shadow Market. Ty, Kit, and Livvy discovered the true nature of what happened to Annabel Blackthorn with the help of a warlock, Shade. Their visit to the London Shadow Market ended terribly as Ty, Kit, and Livvy were forced to fight off angry Downworlders. Livvy was injured, leading Ty to be distraught. They were narrowly saved by Magnus Bane. After they returned to the London Institute, Ty was comforted by Kit.

Ty, Kit, and Livvy were sent to order the ingredients to Cristina and Mark's binding spell at Hypatia Vex's shop.

Ty figured out that the raven that Annabel and Malcolm used to send messages was a stone one. Using this knowledge, Ty and Kit went through an unregulated portal in the London Institute to the Cornwall Institute. Ty left a message to Annabel inside the stone raven.

Ty, Kit, and Livvy then were sent to pick up ingredients they ordered previously. After their visit, they were attacked by three of the Seven Riders. Diana and Gwyn managed to save them.

Ty admitted to Kit that he did not want to go to the Scholomance anymore.

When the Seven Riders attacked the London Institute, Ty joined the others in fighting them. The odds were not looking good until Annabel Blackthorn arrived. The threat of Annabel and Magnus's power combined caused the Seven Riders to retreat. Annabel revealed she came to the London Institute due to Ty's note.

Livvy revealed that Ty finally agreed to be her parabatai.

Ty went to the Council meeting, where he reunited with his older sister, Helen Blackthorn and her wife, Aline Penhallow. When Annabel was interrogated with the Mortal Sword, she went mad, killing both Robert Lightwood and Livia Blackthorn. Ty then collapsed in shock.[8]

Personality and traits

Ty has his own way of expressing his thoughts; he sees the world differently, and while this is known among mundanes as autism, it is not accepted in Shadowhunter society and Ty is seen by some as odd or strange. Ty tends to keep to himself, and his inclination to do something may depend on his mood at times. He is also extremely stubborn.[6]

He wants to be a detective and is an avid fan of Sir Arthur Conan Doyle's Sherlock Holmes and other crime stories in general.

Ty also loves animals. Though he likes many species, he particularly likes those with wings, such as butterflies, moths, and is especially fond of bees. Ty takes pride in being able to draw insects realistically.[9] He spends a lot of his time outside to bother animals like lizards and squirrels.[6] When he was young, he even hid animals in his room—such as bees and once a rattle-snake—claiming to be studying them and being their friends, which he often got in trouble for, and was also practically inseparable from the stuffed bee Jules had gotten him.[5]

Ty's room is neat and organized. His books were sorted according to color, with his favorite colors near his bed and the ones he didn't like were hidden from view in nooks and spaces. Though not arranged in a typical way, Ty would know every book's location by heart. His most loved books, the Sherlock Holmes stories, sit on his bedside table along with a collection of small toys that Julian made for him when he was younger to help him calm down and focus.

Whenever heavily stressed, Ty comments that the pressure of being held, whether through a hug or a simple hand hold, helps ground him.[8]

Physical description

Tiberius, unlike his siblings, has dark black hair and gray eyes, as opposed to the family's trademark brown hair and blue-green eyes. He and his twin sister Livvy were born with gray eyes, though hers had changed to blue-green since, though they both still have long lashes and cupid's bow lips. Julian puts down Ty's ability to be different to sheer stubbornness. Ty is apparently also quite skinny, and is also seen as attractive by those around him.


Tiberius and Livvy are practically inseparable. They are fiercely protective of and would do anything for each other. Livvy is one of the few exceptions to Ty's reservations; that in one way or another, Ty almost always gives Livvy what she wants... except becoming parabatai.

Ty cares for Julian, who practically raised him, very much. Though he rarely show Julian much affection, he is visibly upset when Jules' life seems at risk. Julian goes out of his way to make Ty as comfortable as possible, showing that they have a special bond. Growing up, Jules concocted ways to accommodate the way Ty's mind works and never made him feel less or any different from others.

Skills and abilities

Ty isn't much for fighting, specifically because he had no interest in it. When the need arises however, and when he feels like it, Ty would pick up a weapon. He is actually quite skilled at throwing knives,[6] which is his primary favored weapon,[10] along with the quarterstaff.[9]



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Following the family tradition of Greek and Latin names, his namesake is that of the Roman emperor Tiberius who was married to Livia Drusilla, whom Andrew named his twin sister after, a deliberate instance which Andrew finds funny.[11]


  • While Ty's features do not exactly resemble his siblings', he does look like their Blackthorn ancestors,[6] such as Jesse and Rupert.[12][13]
  • Ty is partly based on Cassandra Clare's autistic step-brother.[14][15]
  • Ty favors classical music since classical music is an anxiety reducer and he often uses headphones to block out noise that might cause disregulation/anxiety. Also he generally likes listening to music.[16]
  • Livvy, Ty's twin, wanted for them to be parabatai but because Ty wanted to go to the Scholomance, he said no, even though he rarely disagreed with Livvy. Later on, after meeting the Centurions in Lord of Shadows, Ty realised that he didn't want to become one of them, and agreed with Livvy on being parabatai.[17]