Who Are The Main Antagonists In 'Killers Of A Certain Age'?

I’m trained to do one thing: kill. I was put into a school where the concepts of love and forgiveness were treated as weaknesses. When I graduated, they told me I’d be lucky to survive; now I’m the best of the best and the person who gets the job done no matter what. I’ve assassinated Presidents, housewives, Navy SEALS and more shifters than I can count. I have more kills than anyone in my business, so when a new order comes in to kill Alpha Gideon, I take it without a second thought. ​He’s a job like any other, but during my scouting, I see something I’ve never seen before. Alpha Gideon isn’t a tyrant or a bully; he’s kind to his Pack. I start asking questions, which is when everything goes to shit. My signal is found, and for the first time in my life, my target has me in his sights. I expect pain and maybe even death, but Alpha Gideon treats me like a welcomed guest; his warmth and kindness open up something inside of me that I didn’t know I had. I should kill him before he changes me completely. I tell him I’m cold and heartless, and he laughs. Loving a mark has never been done, but no matter what I do, every touch sets me on fire and with each longing glance, my past becomes a distant memory. I’m ready to put everything I was aside to stay with Alpha Gideon when the call comes in; my fellow assassins have been called. The bounty on Alpha Gideon has been doubled. I have two choices: protect the man who has opened up my heart or kill the target and get the job done.

My sister leaves some last words before committing suicide, and everyone who sees those words die. My grandmother is the first to go, and then my father. In the end, even my mother jumps off a 30-story building. The reporters fall over themselves trying to score an interview with me, and the police interrogate me. Countless people want to know what my sister's last words are. However, I keep my silence until my sister's tenth death anniversary. I see a figure before her grave, and I'm agitated beyond imagination. I know it's time for death to take me.

Reina Carlo was forged by the Stingers, a shadowy organization that raised her to be a weapon. Her memories of a family—a mother’s face or a father’s embrace—were long lost, replaced by the harsh discipline and ruthless training of her surrogate family. To her, the Stingers were everything, until betrayal shattered the fragile foundation of her loyalty. Now, Reina walks the streets as the hunter, her mission deeply personal. A man who dared to strip away her last shred of innocence must face the consequences. Her scars are tools, her training a guide, and by sunrise, her vengeance will be complete. But each kill leaves a stain on her soul, no matter how she rationalizes it. She tells herself the trade is fair: she removes monsters, and the world lets her survive another day. Redemption and forgiveness don’t belong in her world—they are luxuries for those unbroken by life. Yet the nightmares persist, whispering of a stolen past and a family that might still exist. Did they abandon her, or did they think her lost? These thoughts claw at her resolve, forcing her to confront a truth she can’t bury: forgetting isn’t the same as letting go. Her pact with Marco Alessandro—a powerful, calculating man—only adds to her turmoil. Their marriage of convenience grants her the resources to find her family and avenge her past. But Marco’s unrelenting gaze and quiet intensity break through her defenses, challenging the walls she’s built. As vengeance, love, and identity collide, Reina faces a choice: cling to the darkness she knows or risk everything for a future she can’t predict. In this world of shadows and betrayal, Reina Carlo fights not just to survive—but to discover who she truly is.

Barbara Neil Aryan never planned to become a killer. But after discovering her boyfriend’s betrayal with her best friend, a thirst for vengeance and a mental illness leaves her with no choice. Desperate to escape incarceration, she stumbles into the dark underworld, where she is promised a chance to reinvent herself and clear her name, but Barbie gets sucked further into the underworld, where she is reborn as the “Black Widow,” an assassin with an unmatchable kill record and a deadly reputation. Even though it is not the life she imagined for herself, she embraces it, until her broken world shatters once again when she’s assigned an impossible target: Xavier Knight. He’s cunning, he’s lethal...and something she never expected—a werewolf. But those creatures aren’t real, right? Xavier is everything Barbara despises—arrogant, magnetic, and maddeningly charming, but as he draws her into his world, Barbara discovers more than just a target. For the first time in her life, she’s faced with a man who might actually mend her fractured heart and restore her hope in men. Now, Barbara stands on the edge of two paths: abandoning her deadly past or embracing an unknown future in Xavier’s arms. But when vengeance is all you know, can you really surrender to love?

One keystroke can dismantle an empire. One touch can burn it all down. Zlliot “Zli” Lukeson is known as The Ledger. A forensic accountant for the elite Camelot Unit, he doesn’t kill with bullets—he kills with bank accounts. Driven by the cold, jagged memory of his sister’s execution, he’s spent years tracking the blood money of the Crimson Dragons. He’s calculated every move, accounted for every risk, and prepared for every variable. Except for Ronan Hwan. Ronan is the Syndicate’s crown prince—a brilliant, rebellious lion drowning in the shadow of his ruthless matriarch mother. He’s hedonistic, sharp-edged, and plagued by a pain only power can numb. When a mysterious, observant stranger named "Mike" walks into his nightclub, Ron doesn't just see a conquest; he sees a challenge he’s been craving his entire life. What starts as a lethal game of cat-and-mouse in a New York penthouse spirals into a volatile collision of grappling, shattered glass, and forbidden heat. Zli is there to steal Ron’s secrets; Ron is determined to keep the man who tried to kill him. Now, trapped between a vengeful agency and a possessive mafia heir, Zli must decide: is he the predator, or has he finally met the man who will put him in a gilded cage? In the city of New York, the numbers always balance. But when vengeance meets obsession, the cost is more than either man can afford to pay.

Deadly. Disgraced. Disarmed. Harlow is the Faction's top assassin—lethal, loyal, and emotionally detached. Until her partner is killed in the line of duty… and he dies whispering that he loves her. Now, spiraling from grief and guilt, Harlow is exiled to a remote mountain town for a forced sabbatical. She's angry, volatile, and worse—completely purposeless. But peace isn’t what awaits her. Malachi is the Alpha of the largest werewolf pack in the Northwest, hardened by war and haunted by the violence he must wield to protect his people. With enemy wolves threatening his territory and whispers of a coming war, he can't afford distractions—especially not the deadly human woman who crashes into his world with a sharp tongue, faster fists, and secrets that could tear both their lives apart. When fate collides assassin with Alpha, sparks ignite. But as Harlow uncovers a supernatural conspiracy and Malachi grapples with the truth of their bond, they must face enemies from both their worlds—before everything burns. Laced with dark humor, brutal action, and smoldering chemistry, Alpha’s Assassin is a gritty, fast-paced paranormal romance for fans of enemies-to-lovers, morally gray leads, and high-stakes supernatural intrigue.