Malachizrien Diamundis Character Analysis in Our Vicious Oaths
Overview: The King Who Broke the World to Keep It Safe
Malachizrien Diamundis—called Malachi by those closest to him—is the newly ascended king of the Apollyon Court and the central antagonist-turned-partner of Our Vicious Oaths. He enters the story as the orchestrator of the wedding massacre that kills Kadeesha's father and dozens of southern nobles, then claims Kadeesha herself as a war prize. Over the course of the novel, he evolves from a vengeance-driven monarch into a ruler who swears binding oaths to share his throne with the woman he was prepared to kill.
The text presents Malachi as a figure of contradictions: a king who despises prophecy yet shapes his entire reign around thwarting it, a man who treats marriage as a political chore yet falls into a genuine partnership, and a ruler who threatens annihilation while quietly negotiating for peace. His arc is less a redemption than a redefinition—he does not stop being brutal, but he learns to aim his brutality at enemies rather than allies.
This analysis traces his plot role, motivations, chronological development, relationships, and key decisions, distinguishing what the text explicitly establishes from what readers may reasonably interpret.
Plot Role: Architect of the Massacre, Reluctant Partner
Malachi's first major action occurs before the novel's opening chapters: he spends months planning the assassination of the Hyperion king Rishaud, the Aether king Sylas, and their high-ranking nobles at Rishaud's wedding to Kadeesha. The text makes clear this is not a hasty strike—Malachi tells his aunt Nychelle he has been planning it for months and has already sent a scouting party ahead. His stated reasons are twofold: personal vengeance for his parents' murder at the hands of the Six Kingdoms, and political necessity, since a Hyperion-Aether alliance would galvanize the Cleric's Rebellion against Apollyon sovereignty.
The massacre succeeds in killing Sylas and many nobles, but Rishaud escapes. This failure shapes the rest of the novel. Malachi takes Kadeesha as his war prize, intending to use her as leverage and eventually kill her once their arrangement ends. Instead, she becomes his equal in a series of escalating negotiations, confrontations, and shared battles.
By the epilogue, Malachi stands beside Kadeesha as high king of the newly formed Seven Kingdoms, having sworn oaths to rule together and having accepted her pregnancy with the prophesied heir. His plot role thus moves from destroyer to co-architect of a new political order.
Motivations and Traits Shown Through Actions
Vengeance as a Driving Force
Malachi's defining motivation is vengeance for his parents' deaths. The text reveals he has wanted to rend the Six Kingdoms apart since boyhood, and he held off on his strike for nearly twenty years. This vengeance is not merely personal—it is intertwined with his sense of duty to his court. He frames the assassination attempt as securing Apollyon sovereignty against the Cleric's Rebellion, which he believes would lay his court at the feet of an outsider king.
His vengeance is shown through action rather than stated feeling. He personally leads the massacre, takes Kadeesha as a prize, and later negotiates with her only when she offers information about Rishaud's role in the Cleric's Rebellion. His hatred of Rishaud is so consuming that he accepts a lesser bargain—leaving the Aether Kingdom independent—in exchange for intelligence that will help him destroy the Hyperion king.
Pragmatism Over Ideology
Despite his reputation for brutality, Malachi is deeply pragmatic. He does not believe in prophecy, telling his court he does not believe in the damn things, yet he acts to prevent prophecies from being fulfilled because he refuses to take chances. This pragmatism extends to his personal life: he agrees to marry to appease his nobles, delegates the choice of bride to Nychelle, and treats the entire process as a duty rather than a desire.
His negotiation with Kadeesha over the Aether Kingdom's independence demonstrates this trait clearly. He offers her a limited oath—leaving Aether lands out of his current conquest campaign—while explicitly reserving the right to engage with her as an adversarial monarch in the future. He is willing to make concessions, but only those that serve his larger goals.
Possessiveness and Control
Malachi's possessiveness toward Kadeesha is established early and grows throughout the novel. When his cousin Cassius looks at her with salacious focus, Malachi has to swallow a possessive growl. When Kadeesha draws his blood in the arena, he responds with a predatory promise of punishment that carries an undercurrent of attraction.
This possessiveness is tied to his need for control. He despises not knowing the full scope of his enemies and the political schemes around him, a trait he explicitly connects to his parents' deaths. His Cadre is loyal to him unquestionably, and he trusts only them, his aunt, and his cousin with his inner counsel.
Capacity for Change
The text shows Malachi capable of revising his plans and his feelings. He initially intends to kill Kadeesha along with her court, but after their night together, he finds the word yes will not form when his Cadre asks if they are proceeding with the plan to murder her. He does not spare her out of sentiment—he tells himself it changes nothing—but the hesitation marks the beginning of his shift.
By the epilogue, he has sworn oaths to rule alongside her, affirmed her pregnancy with the prophesied heir, and issued a warning to the court that implies his commitment to their shared future. The text does not present this as a transformation of his nature, but rather as a redirection of his loyalties.
Chronological Arc
The Plan and the Massacre
Before the novel opens, Malachi has spent months planning the wedding massacre. He uses a spy to learn that Kadeesha secretly owns a pleasure club and gambles—correctly—that she will seek sanctuary there the night before her unwanted marriage. Their tryst is part of his plan to sow chaos, but it also plants the first seed of complication.
The massacre itself succeeds in killing Sylas and many nobles but fails to kill Rishaud. Malachi takes Kadeesha as his war prize, and she accepts his terms only when he threatens her friends' lives, sealing their bargain with ancient oath magic.
The Apollyon Court and Cassius's Challenge
At court, Malachi faces a political challenge from his cousin Cassius, who publicly contests his right to the throne. The text shows Malachi navigating this threat with a combination of restraint and menace—he wants to kill Cassius but is held back by the political consequences and by Nychelle's insistence that he cannot simply extinguish powerful nobles.
During this period, his relationship with Kadeesha oscillates between hostility and attraction. He watches her consider how to use what she has learned against him, and he warns her that Cassius will be dead before they return to trying to kill each other.
Negotiation and Alliance
The turning point comes when Kadeesha offers him information about Rishaud's role in the Cleric's Rebellion. Malachi negotiates hard, offering only a limited oath of non-aggression toward the Aether Kingdom rather than the expansive protections she seeks. He accepts her terms only after weighing his hatred of Rishaud against the value of conquering a court he considers insignificant.
This negotiation establishes the pattern of their relationship: mutual suspicion, grudging respect, and a series of bargains that bind them closer together.
The Vassal Ceremony and Marriage
The text depicts a ceremony where the vassal monarchs pledge future oaths of fealty to Malachi and Kadeesha. During this ceremony, Kadeesha experiences a moment of vertigo in which she sees how right they look standing together before the cleric. Malachi produces the jewel-handled daggers customary to Apollyon royal weddings, and the scene carries the weight of an impending marriage.
The Epilogue: Co-Rulers
In the epilogue, Malachi and Kadeesha appear before the Aether court wearing flying leathers and crowns. Malachi speaks, affirming his role as high king and partner while issuing a warning. The hall rises in support, and Kadeesha reflects on her contentment with Malachi and their son.
Relationships
Kadeesha Mercier
The central relationship of the novel is Malachi's evolving bond with Kadeesha. It begins as a calculated seduction, becomes a hostage arrangement, and eventually transforms into a genuine partnership. The text shows this evolution through small moments: his hesitation to kill her, his possessiveness when Cassius looks at her, his willingness to negotiate rather than dominate, and finally his oath to rule alongside her.
The relationship is marked by mutual respect for each other's power. Kadeesha notes that Malachi's void magic is leagues above her aether flames, and he acknowledges her as a formidable foe. Their dynamic is competitive and adversarial even as it becomes intimate.
Nychelle and Trystin
Malachi's aunt and cousin form his inner council alongside his Cadre. Nychelle serves as a moderating influence, urging him toward political prudence rather than impulsive violence. Trystin acts as a practical advisor, pointing out the consequences of killing Cassius in private quarters. Malachi trusts them both, though he resents their constraints on his darker impulses.
The Cadre
Malachi's Cadre—Shionne, Jakobi, Kiyun, Zayvier, and Dedrick—are his unquestionably loyal inner circle. They were elevated to heads of their bloodlines after the massacre of his father's inner court during the Cleric's Rebellion. The text shows them as extensions of Malachi's will, willing to threaten, kill, or die for him.
Cassius
Cassius is Malachi's treacherous cousin who challenges his right to the throne. Their relationship is one of mutual contempt and barely restrained violence. Malachi tolerates Cassius only because killing him would weaken the court and invite accusations of usurpation.
Key Decisions and Consequences
The Wedding Massacre
Malachi's decision to assassinate Rishaud, Sylas, and their nobles at the wedding has far-reaching consequences. It succeeds in killing Sylas and many nobles but fails to kill Rishaud, leaving the Hyperion king alive to continue his agenda. It also creates Kadeesha as an enemy who becomes his partner.
Sparing the Young Fae
When dealing with a group of fae who have committed offenses, Malachi decides to spare those aged seventeen or below from interrogation. The text shows him making this choice not out of mercy but out of political prudence—he needs to keep powerful, loyal Apollyon fae alive for the coming war with the Six Kingdoms.
The Aether Kingdom Negotiation
Malachi's decision to accept a limited oath rather than conquer the Aether Kingdom reflects his prioritization of vengeance over expansion. He trades the possibility of subjugating Aether for information that will help him destroy Rishaud. This decision preserves the Aether Kingdom's independence and sets the stage for his eventual alliance with Kadeesha.
The Oath to Rule Together
In the epilogue, Malachi swears oaths to rule alongside Kadeesha as high king and partner. This decision represents the culmination of his arc, transforming their adversarial relationship into a shared project.
Theme and Symbol Connections
Prophecy as a Tool of Control
Malachi's relationship with prophecy is central to his character. He does not believe in prophecies but acts to prevent them from being fulfilled, particularly the prophecy that he will bring ruin to the Apollyonfolk. His refusal to let his own actions clear a path for Rishaud to bend prophecy to his advantage shows how prophecy functions as a political weapon in the novel.
Bodily Autonomy and Reproductive Agency
Malachi's approach to marriage and heirs reflects the novel's themes of bodily autonomy. He treats marriage as a duty to produce an heir, delegating the choice of bride to Nychelle. His eventual partnership with Kadeesha, including her pregnancy with the prophesied heir, suggests a shift from duty to genuine choice.
The Moral Cost of Vengeance
Malachi's vengeance comes at a tremendous cost. The wedding massacre kills innocents, creates new enemies, and nearly destroys the possibility of peace. His arc suggests that vengeance, while satisfying, must eventually give way to something more constructive.
Oaths, Bargains, and Binding Promises
The novel's magic system is built on oaths, and Malachi's story is defined by the bargains he makes. From the initial oath that binds Kadeesha to his terms to the final oath to rule together, his relationships are formalized through binding promises.
Power, Rulership, and Legitimacy
Malachi's struggle to secure his throne against Cassius's challenge raises questions about what makes a legitimate ruler. His willingness to use violence is tempered by political calculation, and his eventual partnership with Kadeesha suggests that shared power may be more stable than absolute rule.
Questions and Answers
1. Why does Malachi orchestrate the wedding massacre?
Malachi plans the massacre for two reasons: personal vengeance for his parents' murder by the Six Kingdoms, and political necessity. He believes the Hyperion-Aether alliance would galvanize the Cleric's Rebellion and threaten Apollyon sovereignty. He tells Nychelle he has been planning the strike for months and that it is about securing his court's independence.
2. Why does Malachi spare Kadeesha when he intended to kill her?
The text shows Malachi hesitating when his Cadre asks if they are proceeding with the plan to murder her. He tells himself the night they spent together changes nothing, but the word yes will not form. This hesitation marks the beginning of his shift from seeing her as a target to seeing her as a person.
3. What does Malachi gain from his negotiation with Kadeesha over the Aether Kingdom?
Malachi gains information about Rishaud's role in the Cleric's Rebellion, including Lady Keeya's account and the Stone Warden's agreement with Rishaud. In exchange, he swears an oath to leave the Aether Kingdom out of his conquest campaign and recognize Kadeesha as its independent sovereign.
4. How does Malachi handle Cassius's challenge to his throne?
Malachi initially wants to kill Cassius but is restrained by political considerations and Nychelle's insistence that he cannot simply extinguish powerful nobles. He formally hears the challenge, has Trystin remove Cassius from his presence, and later warns Kadeesha that Cassius will be dead before they return to fighting each other.
5. What does Malachi's oath to rule with Kadeesha signify?
Malachi's oath to rule alongside Kadeesha represents the culmination of his arc from enemy to partner. It transforms their adversarial relationship into a shared project and suggests that he has found a purpose beyond vengeance. The epilogue shows him affirming his role as high king and partner while issuing a warning to the court.