In the Citadel: Diana finale, Diana reunites with Edo but discovers his deadly bioweapon, “Jupiter.” After learning Manticore caused her parents’ deaths, Diana kills Matteo, and Edo betrays his father Ettore, killing him. Gabriele, presumed dead, reappears, hinting at future plans to rebuild Citadel and fight Manticore.

In the latest episode of the Citadel universe, Citadel: Diana brings new twists and shocking revelations.

The finale leaves viewers questioning whether the characters have fully revealed their true intentions.

Diana’s journey intertwines with Manticore’s dark plans and personal losses, leading to an intense climax involving deadly bioweapons, betrayal, and long-buried secrets.

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Why Does Diana Return to Manticore?

At the start of Citadel: Diana’s finale, Diana seems to have moved on from her covert life.

She reconnects with her sister, Sarah, who knows bits and pieces of her secret life but not the full extent.

Diana has money, freedom, and her father’s house sold, but something keeps pulling her back.

Despite appearing settled, it seems likely she has been secretly in contact with Gabriele, the Citadel agent who trained her.

Although Gabriele was presumed dead after the fall of Citadel eight years ago, there are hints that he is alive and that Diana is preparing to rejoin Citadel’s cause.

Still, she finds herself pulled back to Edo Zani, the head of Manticore Italy and her former lover.

Edo offers her a choice—stay with him and help Manticore become the peacekeeping syndicate he envisions, or leave.

But instead of abandoning him, Diana returns after a month, rekindling their romance. But it’s not just love that binds them.

Edo has created a deadly bioweapon known as “Jupiter,” a parasitic chip capable of controlling millions through water.

When Diana learns this, her path is clear. Edo’s weapon must be stopped, and Diana is the key to ending Manticore’s reign.

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Edo’s Betrayal and Ettore’s Death

Edo reveals the truth to Diana—Manticore orchestrated the plane crash that killed her parents because a Citadel agent was on board.

It becomes clear that Diana’s mission to find out the truth behind her parents’ death is coming to a head.

However, rather than seeking immediate revenge, Diana stays close to Edo, which suggests a deeper plan may be in motion.

Meanwhile, Edo asks his father, Ettore Zani, to appoint Diana as the manager of Manticore Italy, giving her power within the syndicate.

Ettore seems to comply but secretly plans to kill Diana after extracting information on how to use the bioweapon.

Ettore’s ambition to make the Zani family the most powerful in Europe blinds him to the potential betrayal lurking close to him.

When Edo learns of his father’s plans to eliminate Diana, he snaps. He uses his father’s own bioweapon, spiking his water with the parasitic “Jupiter” chip, and confronts him.

Edo threatens to kill Ettore unless he stops the attack on Diana. But in a cold twist, Ettore refuses, claiming Edo will eventually become just like him—a heartless man who puts power above everything else.

Fueled by anger and a desire to protect Diana, Edo pulls the trigger on the weapon, killing his own father.

Ettore Zani is dead, but the path forward for Edo is even more uncertain now that he holds the reins of Manticore.

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Is Gabriele Alive?

As the episode nears its end, Diana successfully kills Matteo, the manager tasked with eliminating her.

Just when she thinks she can finally escape, she comes face-to-face with Gabriele, now older but very much alive.

The reunion brings a wave of relief for Diana, who has trusted Gabriele since the beginning.

His sudden reappearance suggests that all the pieces of Diana’s past are finally falling into place.

Gabriele, once thought dead, appears ready to help Diana rebuild Citadel’s Italian branch and reclaim the technology Manticore stole.

Together, they could use Manticore’s own bioweapons against them, turning the tide in Citadel’s favor.

However, this reunion raises more questions than it answers. Has Gabriele been hiding something all along? Could his motivations extend beyond loyalty to Citadel?

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What Lies Ahead for Edo and Diana?

Looking ahead, Citadel: Diana leaves the door wide open for more twists. There are two possible paths for Edo.

He may discover that Diana has been working against him with Citadel all along, leading him to completely lose control and fulfill his father’s prediction.

Or, despite the betrayal, Edo might side with Diana, choosing love over power and joining forces with Citadel.

While this seems like a long shot, the unpredictable nature of the show leaves room for all possibilities.

Season 2 could explore the depths of Gabriele’s character and whether he’s truly working for Citadel or has hidden motives of his own.

It will also focus on Edo’s journey as he grapples with the reality of his father’s death, his role within Manticore, and his relationship with Diana.

Diana’s secret, the fact that she killed Edo’s brother, will undoubtedly come to light. This could either strengthen her and Edo’s bond or turn them into the enemies they were always meant to be.

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The Power of “Jupiter” and What It Means for Manticore

The parasitic chip called “Jupiter” is not just a tool for mind control; it’s also a deadly weapon capable of executing those who are implanted with it.

With Ettore gone, Edo now has the power to decide how this bioweapon will be used.

Diana, Gabriele, and Citadel could exploit this weapon to destroy Manticore from within, using Edo’s own creation against him and the rest of the syndicate.

However, the moral question remains: will Citadel use Manticore’s tech for revenge, or will they strive for a more just outcome?

The lines between good and evil blur as Citadel: Diana explores the ethics of power, control, and betrayal.

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What’s Next for Diana?

The show is called Citadel: Diana, so it’s clear that her journey will remain the central focus.

Whether she fully reunites with Gabriele and Citadel or continues her complicated relationship with Edo is yet to be seen.

The next season could also explore how Diana balances her personal vendettas with the greater mission of stopping Manticore once and for all.

Additionally, Diana might uncover darker secrets surrounding her parents’ death. If Edo is found complicit in the plane crash, it could push her toward a final, irreversible break with him.

But for now, Diana seems poised to continue walking a dangerous line between love, loyalty, and justice.

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Could Gabriele Be a Villain?

A wild card theory could be that Gabriele isn’t the fatherly figure he seems to be. If Gabriele has been manipulating Diana this whole time, his true motivations might not align with Citadel’s moral code.

His sudden reappearance just when Diana needs him most could be a carefully orchestrated move.

It remains to be seen whether Gabriele has been guiding Diana for Citadel’s cause or if he has personal motivations of his own.

With so many possible outcomes, Citadel: Diana keeps viewers on the edge of their seats, wondering how these complex characters will navigate the treacherous waters ahead.