After being brought back to life, thanks to the trick played on Nefarian Serpine by High PriestAuron Tenebrae, Skulduggery Pleasant, consumed by rage, dons black armour, and starts training to become a Necromancer and creates the alias Lord Vile. After mere months of training Vile becomes immensely powerful, thus leads the Necromancers to believe that Lord Vile is the Death Bringer. But before Vile can even learn about The Passage, he joins Mevolent's forces as one of The Three Generals, in order to express his rage. During this period, he kills Ghastly Bespoke's Mother. After killing millions, Skulduggery comes to his senses, and deep inside a mountain, takes the armour of Lord Vile off, hides the armour and vows to redeem himself for his "unspeakably evil" deeds. He also abandoned his family crest until he felt he had earned the right to use it again. After this, for a long time Lord Vile was trapped in Skulduggery's subconscious. Tenebrae states that it was because of Skulduggery being trapped in a dimension with the Faceless Ones that unhinged him, which consequently allowed Lord Vile's armour to surface from inside Skulduggery himself. In The Faceless Ones Ghastly says that he faced Vile in the war, after his mother's death, but Vile didn't kill him, the conversation is interrupted but it can be presumed that this was when Skulduggery came to his senses and Vile "disappeared".
In Playing with Fire, Baron Vengeous is released from prison to finish his work to bring back the Faceless Ones by bringing the Grotesquery alive. One "ingredient," as China Sorrows put it, was to use a Necromancer's powers. Since Vengeous did not have Necromancy, he dug the armour up in the caves where Vile was said to have disappeared, and his armour had vanished with it. Soon he finds it and uses it to revive the Grotesquery, but also later to become immensely powerful against enemies trying to stop him. It proved very powerful, as the darkness soaked up bullets, wiped away fireballs and other waves, and even break Mr. Bliss's knuckles later on. However, when Skulduggery later battles Vengeous and rips the chest plate off, the Necromancy was to weak to have much effect, and Vengeous was defeated. After fighting him, the armour was hidden by Irish Grand Mage, at the time Thurid Guild, "so nobody could use it again". However Skulduggery is suspicious of Guild and does not believe his claims that he will hide it away.
"I believe he will hide it away until he has a use for it." Skulduggery Pleasant
When Tesseract flees from Skulduggery after he successfully assassinated the Torment, Vile's armour appears and mortally wounds Tesseract with relative ease. Skulduggery then also attempts to fight the armour but he too is then defeated. There is then a brief conversation between Skulduggery and the armour, where Skulduggery begins to utter in disbelief; "You're dead. You're not real. You're dead." The armour then disappears with a burst of shadows, leaving a mortally wounded Tesseract and Skulduggery stunned.
Tesseract, mortally wounded, then has a conversation with Skulduggery where Skulduggery reveals that the man called himself Lord Vile and that he has come back and plans to kill the Death Bringer and all Necromancers. Tesseract then questions Skulduggery asking why Lord Vile would tell Skulduggery about his plans. When Skulduggery doesn't answer Tesseract then goes on and explains how he makes files on anyone he is likely to go up against, implying he has made one on Skulduggery, and he knows Lord Vile had never encountered Skulduggery before and that when Lord Vile came into the War after Skulduggery left. Tesseract also said Skulduggery was scared of Lord Vile and he implied that Lord Vile had something to do with the resurrection of Skulduggery.
After being captured in the necromancer temple, Auron Tenebrae reveals to Skulduggery that it was by his doing that Skulduggery had survived Serpine's red right-hand, and much to Valkyrie's horror, Tenabrae tells her about Lord Vile really being Skulduggery. Later on, they confront the Necromancer Melancholia St Clair who is the supposed Death Bringer in the caves under Gordon Edgley's house. To defeat her, Skulduggery calls upon Lord Vile but after wounding her, he is consumed by his old persona. Valkyrie and Melancholia escape the caves but are swiftly pursued. Valkyrie calls upon Darquesse, and an epic battle ensues in which they both sustain massive injuries before resuming their true personalities.
In the alternate dimension it is revealed that Skulduggery is still in his angered state and is still Lord Vile. When the resistance tries to break Valkyrie out, Lord Vile attacks, however, they escape. Vile then sends a full on attack and he captures all the escaping prisoners. Later, back in our dimension, Skulduggery turns into Vile to fight Doran, Kitana and Sean, despite them being stronger, he is more skillful and manages to kill them with Darquesse's help. Vile is able to turn Darquesse back into Valkyrie by tapping an tune he had driven into his subconscious, so as to remember it as Vile, triggering a series of flashes which knocks Darquesse out. He then pulls himself out of Vile's state of mind and being.
Lord Vile is mentioned multiple times during Last Stand of Dead Men. Notably, when the Dead Men tell Valkyrie the story of their battle with Vile and an army of Undead, Skulduggery does not wish the story to be told, though the other members of the Dead Men think this is because Skulduggery isn't in it - although he is, in a form. Lord Vile only makes one brief appearance, when Skulduggery's arm is ripped off by the Black Cleaver, Vile briefly takes over (without donning the armour) and blasts the Black Cleaver, with enough force to break every bone it his body.
Lord Vile fights Darquesse alongside Melancholia St Clair. Skulduggery takes charge again after an explosion took place in Roarhaven.
In the alternate dimension, Lord Vile goes face to face with Skulduggery, and flings him away after Skulduggery claims to be a better man than Vile. Vile later aids in the attack agains Darquesse when she visits Mevolent's dimension, severly injuring her. Vile tries to retrieve Mevolent's gun that can briefly drain a user of their magic, but the gun is destroyed and Vile leaves, injured.
Vile is cold and cruel, with an obsession with murder and destruction. He apparently has no sense of remorse, as he "killed whole battlefields" without a second thought. Skulduggery says in the sixth book that Lord Vile doesn't care who his enemy is, as long as he has an enemy.
When Skulduggery is inside Vile's armour, he is an extremely powerful Necromancer (on the same level as someone who has utilised their True Name a few times), possessing the ability to manipulate darkness and shadows to suit his will. However without Skulduggery inside, Lord Vile's armour is simply a powerful Necromancer, as he is superior to Skulduggery and Tesseract, but not Melancholia as shown when Melancholia easily beat the armour without Skulduggery inside. With him inside, she had no choice but to flee. Lord Vile was undoubtedly the most powerful of Mevolent's three generals. Another testament to his strength was how easily he is able to beat even the most powerful of mages, including Tesseract, Ghastly's mother and thousands more. When Vengeous was wearing the armor, he easily knocked out Tanith, Bliss and a contingent of Cleavers. Skulduggery also stated that when he was Lord Vile, he somewhat hoped the Faceless Ones would break through so he would have a chance to kill a entire race of gods after he'd finished on humans. In Death Bringer, with Skulduggery in Vile's armour, he is able to fight and almost kill Darquesse in battle (though it was stated that he would not be able to again, as Darquesse gets stronger the longer she is out). Argeddion states that Lord Vile may have been able to kill him, due to his ferocity, and Argeddion's non-fighting nature. Vile also managed to take on Kitana and her friends with Darquesse's help despite them having powers from Argeddion himself, though it was said that Kitana alone was superior to Vile in terms of power, Vile's superior skill allowed him to fight the three. In Kingdom of the Wicked, when Darquesse mentions the top three most powerful sorcerors (Argeddion, Darquesse, and Mevolent), she does not include Vile, meaning that Darquesse had surpassed him.