|Full name:||William Owen Herondale|
|Age:|| 17 (beginning of series)|
76 (at time of death)
|Cause of death:||Old age (1937)|
|Residence:||The London Institute|
|Significant other/s:||Tessa Gray (wife)|
|Children:|| James Herondale|
|Parents:|| Edmund Herondale (father)|
Linette Owens (mother)
|Sibling/s:|| Ella Herondale †|
|Eye color:||Dark Blue|
Will was born to the Herondale family. He had an older sister, Ella, and a younger sister, Cecily. His father was a Shadowhunter who left the Clave after falling in love with a mundane. When Will was growing up, every six years he was asked if he wished to join the Enclave and he declined. However, when he was twelve years old, he discovered a pyxis that his father had kept from his Shadowhunter days. He unintentionally opened it and released a demon, which then attacked him. His sister Ella came running in and was attacked. While his sister was on the floor, the demon cursed Will so that he could never let anyone love him or else they would die. The next morning, Will's sister Ella was dead. He ran to the London Institute to keep his family safe.
It is revealed in the prologue of Clockwork Princess, that when Will first met Jem Carstairs, who had arrived at the London Institute from Shanghai, Will was in a (permanent) bad mood. Will insults Jem and his ill health, as he does not know the real reason. Jem is not intimidated by Will, and uses the knife that Will threw and missed the target, to hit it's bulls eye. Will takes up Jem's offer to be taught how to throw knives accurately, cementing their friendship. When they were 14, they became parabatai.
The Infernal Devices
Will and his parabatai, Jem, find Emma Bayliss, who has been murdered by a man from the Pandemonium Club, she was being followed by a demon that was killed by Will. They find a dagger with the 'ouroboros' symbol on it's hilt.
Will rescues Tessa Gray from the Dark Sister's house, where she has been kept prisoner. Tessa throws a china jug at him, thinking he was one of the Dark Sisters or Miranda, their servant. However, it catches his arm and injures him. He takes her back to the London Institute after fighting the Dark Sisters, and beheading Mrs. Black.
Will meets Camille Belcourt and accompanies Tessa, who is disguised as Camille, to de Quincey's ball for Downworlders, as her human subjugate. He tries to set off the alarm to alert the other Shadowhunters, but instead sets the curtains on fire. Fortunately, the Shadowhunters realize something is wrong and attack the mansion, killing the majority of Vampires who have broken the Accords. Will fights and bites de Quincey, after pulling him off Tessa, who has changed back into her human form, but he escapes.
Tessa brings holy water to Will, who is forcing himself to throw up any vampire blood he has swallowed so that he does not become a Darkling. Will, who later blames it on the vampire blood, kisses her passionately.
Axel Mortmain arrives at the London Institute warning the Shadowhunters that the Dark Sisters are planning on animating the Magister's Clockwork Army. Will and Jem rush off to stop the Dark Sisters. However they arrive at the abandoned mansion to find only Mrs. Dark conducting a necromantic spell to bring her sister back to life. Realizing that they have been tricked, they rush back to the Institute but Will leaves Jem behind with the carriage.
Will finds Tessa on the floor, with Mortmain next to her, who is surprisingly upset. Mortmain flees after being confronted by Will. Will rushes towards her, upset at her death. He cradles her head in his lap, but then realizes she is breathing. Tessa opens her eyes and tells Will that she tricked Mortmain into believing that she had stabbed herself. Will however is distraught as he believes that he has lost everything.
On an errand for Magnus Bane, Will visits a graveyard and gives 'Old Molly', a ghost, some rings in payment for ingredients for one of Magnus' spells. He asks the ghost if she can supply the opposite of a love potion, however she suggests he acts nastily to scare the girl away. As he leaves, he mutters to himself that it's for him, not her.
He realizes that Tessa has taken a liking to him and he also realizes that he loves her too. Because of this, he goes to Magnus Bane, to summon the demon who cursed him. Magnus summons the demon, Marbas, to release Will from his curse, but Marbas tells them that there was no curse in the first place and swears on it. He tells Will that Ella died because she was wounded from the attack. Will is distraught but rushes back to the Institute, jumping with happiness and tells Tessa he loves her. His happiness is short-lived as Tessa tells him that she is already engaged to Jem. Will, heartbroken, tells Tessa not to tell Jem about his feelings and pretends to be happy about the engagement for Jem.
Will trains his sister, Cecily, to become a Shadowhunter. However, he is annoyed at her presence in the London Institute and her insistence that he come home with her, but he does care for her and is fiercely protective of her.
Will discovers that Jem has been taking large doses of Yin Fen to keep him fit, whilst also killing him inside. He travels to buy more of the demon powder, with Cecily who follows him, but discovers that someone has bought it all up.
When Jessamine Lovelace is brought back to the London Institute from the Silent City, the Magister's automatons attack. Will had no wish to see her, so was inside but upon hearing the noise, rushed down to help. He sees Jem run after a carriage of automatons, but does not realize that they have kidnapped Tessa. Jessamine tells him that Mortmain is in 'Idris', before dying of a stab wound in the back. Jem returns because the carriage was too fast and he collapses.
Cecily overhears Will's conversation with Jessamine and figures out that Mortmain is hiding in Cadair Idris, a mountain near where Will used to live in Wales, as she knew Mortmain and his personality.
Will asks Magnus Bane to help them find a cure for Jem, who is dying and running out of Yin Fen. Magnus asks Will if Jem knows that he was in love with Tessa, but he tells Magnus that he did not want to hurt Jem. But Jem overheard and gives Will his blessing to rescue Tessa, instead of him as he is too ill.
On the road to Wales, Will feels his parabatai rune bleeding, and realizes that Jem has died. He throws up and asks Woolsey Scott for advice, even though he got into a fight with some of his werewolf pack. Will cuts his hand with Jem's dagger and buries it in the ground by a tree.
He eventually finds Tessa in Mortmain's hideout, and rushes to her without thinking, causing him to be trapped inside the invisible barrier with Tessa. Believing that Jem was dead and thinking that they would both die, Will confessed everything to Tessa and told her how much he loved her, then they both had sexual intercourse during the night.
The next morning, Tessa wakes up and realizes that her clockwork angel is on his shoulder near his neck, and she pulls it away to find that it had left a mark in the shape of a small white star on Will, thus creating the mark of the Herondales that will be seen on the descendants in the future generations.
Eventually, Magnus Bane finds them and release them, bringing them to the others where a battle against hundreds of automatons was being held, with the Shadowhunters losing. Will joined the battle right away and, in the gist of the battle, finds out that one of the Silent Brothers, Brother Zachariah, was actually Jem.
Tessa then gets abducted again and Mortmain holds her, threatening Will and the other Shadowhunters with her. Tessa Changes into the angel trapped inside or necklace, Ithuriel, leaving Will in awe as he watched her blaze with fire. She kills Mortmain, but she Changes back into herself afterwards and falls to the ground unconscious, making Will very worried.
They had won the battle, but once Will returned to the Institute with the others, he enters a state of depression because he was worried about Tessa not regaining consciousness, and feeling lost without Jem. Much to his happiness, Tessa recovers and he is allowed a conversation with Jem, which makes him feel gloomy for weeks but gruadually starts to recovery and adjusting to life without Jem.
Will and Tessa grow closer and he finally proposes to her, with Tessa saying yes. They scheduled to marry after Will turns 18, and he uses Henry's Portal to go back to Wales along with Cecily, Tessa, and Gabriel to visit his parents after so long. Will and Cecily have a happy reunion with their parents, and Will announces that Tessa is his fiancé. He has a wonderful time visiting his parents after 5 years.
Tessa and Will get married and have two children, James and Lucie. It is revealed that Will died at 78 years old in 1937 of old age, and Jem, as Brother Zachariah, visits him on his deathbed and bids him the Shadowhunter farewell.
He comes across as rude and arrogant, always utilising his quick wit and sarcasm. He is aware of his good looks and uses it to get his way. This is in fact a front that he uses to keep everyone at arms-length. He is actually caring and would risk his life for the people he loves. He is also self-sacrificing.
Will reads extensively and has a perfect memory. He can find a quote for almost any situation and often makes his own (very bad, although sometimes purposefully) poetry.
Will is described to have deep violet-blue eyes and black hair that falls in his eyes. He has elegant features - high cheekbones; long, thick lashes; full lips and an elegant throat. He is muscular and well built with broad shoulders. He is mentioned to be 6 foot tall and have callused hands from his years of training as a Shadowhunter. He is said to be extremely handsome by most people. He is said to look amazingly like his mother, Linette.
- Superhuman Strength
- Superhuman Agility
- Superhuman Stamina
- Superhuman Coordination
- Stele: Will uses a stele to draw runes on his skin for healing, etc.
- Daggers: Will's specialty is throwing daggers
- Seraph blades
- Throwing Knives
|“||I felt I was dreaming and thinking and feeling with you. I dreamed what you dreamed, wanted what you wanted - and then I realized that I truly just wanted you. The girl behind the scrawled letters. I loved you from the moment I read them. I love you still.||”|
–Will, Clockwork Prince
Will's relationship with Tessa is rocky. At first he treats her quite rudely.
She is the only one, besides Jem, to make him laugh and he takes a liking to her straight away. During the fight where her brother is rescued, Will bites a vampire. Back at the Institute, he stays by himself in the attic drinking Holy Water to get the vampire blood out of his system. Tessa arrives to see how he's doing and he kisses her . At the end of the book, when he realises that she's dead, he feels empty and as if he's lost everything. When he sees that she's actually alive, he is terrified that he showed too much emotion and that she could see that he cared for her so he insulted her on the roof when she told him that she would be staying at the Institute. He did this by insinuating that she was a prostitute, and a barren one at that. However, he has his reasons for doing this, which are revealed in Clockwork Prince.
In the second book, they don't talk but Will, slowly figuring that he's falling for her, goes to find an indifference potion for himself so he can't love her but can't attain one. When they find out Jessamine is a traitor, Tessa disguises herself as Jessamine at the Lightwoods' ball. They kiss on the balcony at the party, only to be interrupted by Magnus. After he finds out that there was no curse on him, he tells Tessa that he loves her but she tells him that Jem already propsosed to her. Will tells Tessa to forget everything that he told her. When Jem announces the engagement at dinner, he makes a toast to him and Tessa and pretends to be happy for them.
|“||Jem is my greatest sin.||”|
–Will, Clockwork Prince
When Jem arrived at the Institute, he and Will immediately became friends after he shows that he is not intimidated by Will's moody attitude. It is said that Will spent a lot of time in Jem's room, ensuring that he wouldn't die because of his yin fen addiction. Will did not tell Jem of the curse put on him when he was 12, but has a close friendship with him, like brothers. When they were 14, Will asked Jem to be his parabatai. Jem refused but when Will but a bet on a sword fight, he agreed.
Before Tessa, Jem was the only person Will truly cared about and showed affection to. He thought that his curse wouldn't affect Jem, since he was already dying. With every passing day that he lived, Will's theory solidified. Will cares for Jem when he is weak and buys yin fen for him from the ifrit's den in Whitechapel because Jem can't face it.
When he found out that Jem loved Tessa and was engaged to her, he sacrificed his love for her and pretended to be happy. He toasted them when Jem announced it at dinner.
Although Charlotte shows feelings of maternal love towards Will, he claims not to care, for reasons unknown until Clockwork Prince. It is revealed that he does care for her in a motherly way, but is just trying to protect her from the 'curse' that supposedly claimed his sister, Ella.
However, he still has not told her about the fake curse the demon put on him, which resulted in him pushing away those who loved or cared for him.