Frederick Arthur is a character you can’t easily forget once you’ve watched Banana Fish. He may not be the main protagonist, but his presence definitely leaves a mark on the story. As part of the Corsican Mafia, Frederick Arthur serves under Lee Yut-Lung and later becomes closely tied to Dino Golzine’s operations. Though he doesn’t speak much, when Frederick Arthur does say something, it carries weight—his actions even more so.

What really stands out about Frederick Arthur is his unwavering loyalty. Whether it’s following orders or standing guard in tense situations, he takes his role seriously. He’s not just some background enforcer either; Frederick Arthur is highly skilled—excellent with a firearm and more than capable in close combat. That’s why others in the organization see him as someone dependable, someone they can count on when things go south.

But here’s the thing—Frederick Arthur isn’t your typical cold-hearted mobster. Sure, he works for a crime family, but he has a moral compass that guides him. There are moments when he visibly struggles with the decisions made by those above him, especially when they cross ethical lines. That inner conflict shows that Frederick Arthur isn’t blindly obedient—he cares about what’s right, not just what he’s told. And when it comes to people he considers allies or friends, Frederick Arthur will go to great lengths to keep them safe.

It’s this mix of discipline, loyalty, and quiet compassion that makes Frederick Arthur such a compelling character in Banana Fish. Fans often find themselves drawn to him because, despite being part of a violent world, he still holds onto his humanity. Frederick Arthur represents the kind of person who values duty but hasn’t lost his sense of justice along the way.

Now, if we look at his personality more closely, Frederick Arthur fits the ISTJ personality type pretty well—Introverted, Sensing, Thinking, Judging. He’s organized, practical, and thrives on structure. You see this clearly in how he manages Dino Golzine’s affairs with precision and dedication. As Frederick Arthur handles paperwork, schedules, and security details, he proves himself to be the backbone of Dino’s operation. ISTJs like routine and reliability, and Frederick Arthur embodies both.

He also deeply respects authority and tradition, which explains his steadfast allegiance—even when Dino’s choices become questionable. Frederick Arthur follows through because he believes in order and responsibility. However, this same trait makes it hard for him to adapt when unexpected changes arise. For instance, when Frederick Arthur learns that Ash Lynx might be involved in the Banana Fish plot, he’s visibly shaken. It throws him off balance because it disrupts the stability he’s come to rely on.

Still, Frederick Arthur’s commitment to his role never wavers. His ISTJ nature shines through in his consistency, work ethic, and sense of duty. While he might struggle with uncertainty, his strengths far outweigh his rigidity. In fact, that very consistency is what makes Frederick Arthur such a trusted figure within the narrative.

On another note, from an Enneagram perspective, Frederick Arthur strongly aligns with Type 6—the Loyalist. This makes a lot of sense when you consider how central loyalty is to his identity. He looks up to Dino as a protective figure and dedicates himself completely to ensuring Dino’s safety and success. For Frederick Arthur, loyalty isn’t just a job requirement—it’s a core value.

Type 6s often deal with anxiety and seek reassurance, and Frederick Arthur is no exception. He constantly seeks clarity and direction, especially in high-pressure moments. His need for security drives many of his decisions, and being part of the mafia gives him a sense of belonging and purpose. But there’s a downside: his loyalty sometimes borders on blind faith. Frederick Arthur defends Dino’s actions, even when they’re morally gray, simply because he fears instability or betrayal.

In the end, Frederick Arthur is a layered character whose sense of duty, internal conflicts, and emotional depth make him stand out in Banana Fish. Whether it’s his ISTJ tendencies toward order and responsibility or his Enneagram 6 desire for security and loyalty, Frederick Arthur remains one of the most grounded and human figures in the series. And honestly, that’s probably why so many viewers remember Frederick Arthur long after the final episode ends.