Olka Gretcher

Olka Gretcher is the daughter of the former boss of the Gretcher Family, a powerful mafia organization in the East Country (Ostania).

After a brutal internal power struggle destroys the organization and wipes out most of her family, she becomes the only surviving member of the Gretcher bloodline.

The new boss, her ex-subordinate Leonard Haphon, targets Olka as a threat to his rule and orders numerous assassins to eliminate her.

To protect herself and her infant son Gram Gretcher, she decides to defect to a third country and start a new life.

The secretive organization known as Garden, which had ties to the previous Gretcher boss, agrees to help facilitate her escape.

Garden operative Yor Forger is assigned as her bodyguard during the escape operation.

During the journey, Olka uses the alias “Shaty Grey” and undergoes plastic surgery to disguise her appearance.

She boards the luxury cruise ship Princess Lorelei with her son Gram and her subordinate Zeb, intending to reach safety in a third country.

Her voice actress is Aya Endo in the Japanese-language version of the series.

Olka originally had long black hair tied back, reflecting a more traditional and composed look.

Because she becomes a prime target in the underworld, she radically changes her appearance to survive.

Under her false identity as Shaty Grey, she alters her hairstyle and facial features through plastic surgery.

She also wears glasses on the ship, further helping to disguise herself from assassins and informants.

Onboard the Princess Lorelei, she consistently goes by the name Shaty Grey in front of strangers and other passengers.

This elaborate cover allows her to move relatively freely while Garden operatives protect her from the shadows.

Olka is deeply grounded and strong-willed, shaped by her upbringing in the criminal underworld.

Despite the extreme danger around her, she usually stays calm and composed, even when others falter.

She shows a firm and decisive side when dealing with Zeb, who is nervous and frightened by the constant threat of killers.

When he panics, she scolds and steadies him, demonstrating her leadership and emotional resilience.

Although she appears cool-headed, she is not emotionally numb.

Her love for her only remaining family, her son Gram, is intense and unwavering, and her choices center on his safety and future.

Olka is largely unaware that Zeb harbors romantic feelings for her, yet she does not dislike him.

Her attitude toward him is warm enough to suggest she holds him in genuine regard, even if she never explicitly responds to his feelings.

She is also capable of empathy toward people outside the criminal world.

When she realizes Yor Forger is a mother with a “cover” family, Olka quietly looks out for her and treats her with kindness.

Gram Gretcher

Gram Gretcher is Olka’s newborn son and the sole remaining member of the Gretcher family besides her.

Olka’s devotion to Gram defines her arc, and her entire escape is driven by the desire to secure his safety and future.

She prioritizes Gram above all else, even more than the remnants of the Gretcher Family’s power or legacy.

Every risk she takes onboard the Princess Lorelei is weighed against what it will mean for Gram’s life in the third country.

Zeb

Zeb is a subordinate who accompanies Olka and Gram on the Princess Lorelei during their escape.

He is inexperienced with violence and deeply unsettled by the wave of assassins pursuing them.

Olka chides Zeb when his fear threatens to compromise their safety, urging him to stay strong.

Despite his anxiety, Zeb is loyal, and he clearly admires Olka beyond a simple professional relationship.

He harbors romantic feelings for her, which she does not consciously acknowledge.

Even so, her attitude suggests she does not reject him on a personal level and likely values him as more than just a disposable underling.

Yor Forger

Yor Forger, an assassin working for Garden, is tasked with protecting Olka and Gram during the voyage.

Although Yor travels with a cover family as camouflage, Olka senses that she is also a mother figure and shows interest and concern for her.

The two women gradually open up to each other as the crisis intensifies.

Olka even lends Yor some of her civilian clothes when they go out on deck for fresh air, symbolizing their growing trust.

Olka witnesses Yor’s unyielding determination as she fights off repeated assassination attempts.

By the end of the mission, Olka deeply respects Yor for risking her life to protect a stranger’s child.

At their farewell, Olka tells Yor that “those hands have secured my child’s future,” expressing heartfelt gratitude.

She also quietly wishes for peaceful days to come for Yor and her family as they part ways.

Garden and Matthew McMahon

Garden, a covert assassination organization, agrees to assist Olka’s escape out of respect for their past dealings with the previous Gretcher boss.

They develop a secret plan to move Olka and Gram safely through the Princess Lorelei and into a third country.

Matthew McMahon, another Garden operative, works alongside Yor to guard Olka.

He participates in the desperate defense against assassins when their covert plan is compromised.

Their involvement underscores how seriously Garden treats its promises and how much danger surrounds Olka.

Without their efforts, Olka and Gram would almost certainly be killed before reaching their destination.

Loid Forger and Anya Forger

Loid Forger and Anya Forger are also aboard the Princess Lorelei for unrelated reasons tied to their own mission and family outing.

From Olka’s perspective, they are simply other passengers, but they end up quietly influencing the outcome of her flight.

While staying in the background, Loid and Anya provide subtle support that helps Yor succeed in her protection mission.

Their hidden contributions, combined with Yor and Matthew’s direct combat, allow Olka and Gram to escape safely.

Olka does not fully realize the extent of the Forger family’s involvement.

Still, the peaceful, familial image they present reinforces her hope that Gram might also enjoy an ordinary, tranquil life someday.

The internal conflict within the Gretcher Family leaves Olka widowed and nearly exterminates her entire bloodline.

Leonard Haphon, a former subordinate who seizes control of the organization, sees her as a dangerous symbol of the old regime and seeks to erase her and her child.

To escape certain death, Olka arranges to flee the East Country for a third nation via the Princess Lorelei luxury cruise ship.

She travels under the alias Shaty Grey, with Gram and Zeb accompanying her as a small, vulnerable group.

Garden carefully crafts a secret plan to smuggle her out while eliminating threats along the way.

However, Zeb’s careless actions inadvertently leak critical information, exposing the operation to the assassins pursuing Olka.

This mistake leads to a flood of gunmen and killers converging on the ship, putting Olka and Gram in immediate danger.

In response, Yor and Matthew are forced into intense, life-or-death battles to keep the assassins away from Olka’s cabin and evacuation route.

Despite the chaos, Olka keeps her composure as much as she can, knowing she must not break down for Gram’s sake.

Her determination echoes in her resolve: it is no longer just her problem—she has to stay strong as a mother.

Thanks to the combined efforts of Yor, Matthew, and the behind-the-scenes support from Loid and Anya, the assassins fail.

The operation concludes with Olka and Gram successfully defecting to the third country and evading Leonard Haphon’s reach.

Before disembarking, Olka expresses deep gratitude to Yor for protecting not only her life but also her son’s future.

With that, she steps off the Princess Lorelei, carrying the hope that Gram will grow up in peace, far from the blood-soaked legacy of the Gretcher Family.