Mei is a central character in the anime series Tokyo Underground, and her presence plays a vital role throughout the story. Set in a hidden underground world beneath Tokyo, the series follows two brave teenagers—Rumina Asagi and Ginnosuke Isuzu—as they embark on a dangerous mission to rescue their friends from the oppressive rule of the Underground Empire. Along the way, Mei becomes an important ally. Though she originally hails from the very empire they’re fighting against, Mei chooses to stand with Rumina and Ginnosuke, showing courage and conviction as she turns her back on tyranny.

What makes Mei stand out is her unique combination of physical prowess and magical talent. She’s highly skilled in hand-to-hand combat, able to hold her own even in intense battles, and she can summon powerful creatures using her magic. But beyond her abilities, it’s her warm, compassionate personality that truly resonates with viewers. Mei’s kindness, especially her gentle affection for Rumina, adds emotional depth to her character and helps endear her to fans of the series.

As the story progresses, Mei undergoes a meaningful transformation. At first, she may seem uncertain or reserved, but over time, she grows more confident in her strengths and learns to trust her instincts. Her bond with Rumina and Ginnosuke deepens through shared trials and challenges, evolving into a strong sense of camaraderie and mutual respect. Mei’s decisions often have significant consequences on the plot, making her not just a supporting figure, but a crucial player in the group’s journey. Her complexity and resilience make her one of the most compelling characters in Tokyo Underground.

Without a doubt, Mei is an essential part of the narrative. Her background, skills, and personal growth contribute greatly to the overall arc of the series. Whether she’s strategizing in battle or offering quiet support to her friends, Mei consistently proves herself as a dependable and courageous companion. Watching her evolve—from someone shaped by the empire’s influence to a self-assured fighter for justice—is one of the most engaging aspects of the show. For many viewers, Mei serves as a relatable and inspiring protagonist, embodying both strength and vulnerability.

When examining Mei’s behavior and personality, it’s quite likely that her MBTI type is ISTP—Introverted, Sensing, Thinking, Perceiving. This personality type is often associated with individuals who are practical, logical, and highly capable when dealing with mechanical or tactical challenges. Mei demonstrates these traits repeatedly, especially in high-pressure situations where quick thinking and resourcefulness are key. His technical aptitude and calm demeanor under stress reflect the classic ISTP mindset. Additionally, his preference for action over words, tendency to work independently, and occasional difficulty expressing emotions all align closely with this type. While he’s undeniably loyal to his allies, Mei often maintains a certain emotional distance, further reinforcing the ISTP profile.

That said, it’s important to remember that personality types aren’t set in stone. People—and fictional characters like Mei—can display traits from multiple types depending on context and growth. Still, the ISTP framework offers valuable insight into Mei’s strengths, such as his problem-solving skills and adaptability, as well as his potential struggles, like forming deeper emotional connections.

Looking at Mei through another psychological lens, the Enneagram, he appears to fit the profile of Type 5—the Investigator. This type is defined by a deep desire for knowledge, independence, and understanding. Mei exhibits this through his introspective nature, intellectual curiosity, and need for personal space. He tends to observe before acting, gathering information and analyzing situations carefully. Emotions are often secondary to logic for Mei, which can make him seem detached or aloof at times. His retreat into study and strategy might also stem from a fear of helplessness—a core theme for Type 5s. By mastering knowledge and honing his abilities, Mei gains a sense of control in a chaotic world.

Moreover, Mei sometimes hesitates to share his thoughts openly, possibly due to a fear of misunderstanding or judgment. This internal barrier can create distance between him and others, even those he cares about. Yet, as the series unfolds, there are moments where Mei begins to open up, suggesting subtle growth beyond the typical Type 5 tendencies.

In summary, Mei from Tokyo Underground emerges as a multifaceted character whose journey is marked by growth, loyalty, and inner strength. Whether viewed through the lens of MBTI or the Enneagram, Mei’s personality reveals layers of depth that enhance his role in the story. From his early days within the Underground Empire to becoming a trusted member of the resistance, Mei’s evolution is both believable and inspiring. And while labels like ISTP or Type 5 help us understand aspects of his behavior, it’s ultimately Mei’s actions, choices, and relationships that define who he is. Throughout the series, Mei remains a standout character—intelligent, resilient, and quietly heroic.