In the visually stunning anime film Interstella5555: The 5tory of The 5ecret 5tar 5ystem, Octave stands out as one of the most intriguing and memorable characters. Co-directed by the legendary Leiji Matsumoto and the iconic electronic duo Daft Punk, the film blends futuristic storytelling with a rich musical narrative. At its heart is the journey of The Crescendolls, an alien band abducted and brought to Earth under false pretenses by a sinister management empire. Along their path to freedom, they cross paths with several allies—none more enigmatic or impactful than Octave.

Octave, quite simply, is a figure shrouded in mystery and musical brilliance. He serves as a guiding force for The Crescendolls, introducing them to the true power of music—not just as entertainment, but as a universal language capable of transcending boundaries and breaking chains. For Octave, music isn’t just sound; it’s a weapon, a message, a lifeline. His belief in its transformative potential becomes a cornerstone of the band’s resistance and eventual liberation. It’s hard to overstate how pivotal Octave is to the story—he doesn’t just influence events, he embodies the soul of the film’s central theme.

Visually, Octave leaves a lasting impression. Dressed entirely in white, complete with a sleek top hat and flowing cape, he cuts a ghostly yet elegant figure. There’s an air of quiet sophistication about him, a sense that he exists slightly outside the world around him. This aesthetic choice isn’t just stylistic—it reinforces his role as a visionary, someone who sees deeper truths through the lens of art. Interestingly, the character was brought to life by Japanese musician Shinichi Osawa, who not only voiced Octave but also contributed significantly to the film’s score. That real-world musical expertise adds a layer of authenticity to Octave’s presence, making him feel less like a fictional creation and more like a genuine artist stepping from the shadows.

What really defines Octave, though, is his unwavering devotion to music as a force for connection and change. He represents the idea that creativity can be revolutionary. Through his actions and demeanor, Octave communicates that art isn’t peripheral—it’s essential. His philosophical outlook resonates deeply, especially in moments when silence speaks louder than words. And while he may appear distant at times, his empathy runs deep. He senses the pain and confusion of The Crescendolls and responds not with lectures, but with melody and meaning.

Now, when we look at Octave through the lens of personality typology, certain patterns emerge. Many would argue—quite convincingly—that Octave aligns closely with the INFJ personality type: introverted, intuitive, feeling, and judging. He’s introspective, often seen in quiet contemplation, processing the world internally rather than seeking constant interaction. His intuition shines through his creative genius—his ability to compose, inspire, and foresee how music can shift the tide of battle. Emotionally, Octave is highly attuned to others. He doesn’t just hear music; he feels it, and he recognizes its emotional weight in those around him. And despite his artistic flair, there’s a method to his madness. He’s structured, deliberate, and purposeful—traits associated with the judging aspect of INFJ.

Beyond MBTI, Octave also fits remarkably well into the Enneagram Type 4 archetype—the Individualist. This type thrives on authenticity, depth, and emotional expression, all of which define Octave’s character. He doesn’t blend in; he stands apart, both visually and emotionally. His all-white ensemble, haunting presence, and tendency to wander alone reflect a deep internal world shaped by longing and idealism. He’s not chasing fame or fortune. Instead, Octave seeks meaning—through music, through art, through connection. He wrestles with feelings of isolation, yes, but channels them into something beautiful. That’s classic Type 4 behavior: turning inner pain into creative fire.

Moreover, Octave places emotion and aesthetics above logic and conformity. While others might focus on commercial success or popularity, Octave cares only about truth in expression. He wants his music—and the music of The Crescendolls—to resonate on a soul level. This desire to be truly seen, to express the depths of the self, is central to the Type 4 experience. He’s not performing for applause; he’s creating because he must.

So, when we pull it all together, Octave emerges as far more than a supporting character. He’s a symbol—a reminder of what music can do when it’s treated as sacred. Whether you’re analyzing his INFJ tendencies or his Enneagram Type 4 core, one thing remains clear: Octave is driven by vision, empathy, and an unshakable belief in the power of art. His quiet strength, creative depth, and moral clarity make him indispensable to the story.

In the end, while personality frameworks aren’t definitive, they do help us understand characters like Octave on a deeper level. And in Interstella5555, where sound and image move in perfect harmony, Octave is the silent conductor of change. His legacy isn’t measured in lines of dialogue, but in the ripples of inspiration he leaves behind. Truly, Octave is not just a character—you remember him because he makes you feel something. And that, more than anything, is why Octave matters.