Let’s talk about Android 20, also known as Dr. Gero—a character who definitely leaves a lasting impression in the Dragon Ball universe. He’s not just another villain; he’s a brilliant scientist with a complicated legacy. Originally part of the Red Ribbon Army, Dr. Gero dedicated his life to creating advanced androids, all in pursuit of world domination. His most notable creations—Android 17 and Android 18—were designed to be unstoppable, though ironically, they later became allies of the Z-Fighters instead of weapons of destruction.

Now, when we look at Android 20’s first appearance in Dragon Ball Z, it’s clear he’s already deep into his plans. He activates his androids with cold precision and orchestrates an attack on the World Martial Arts Tournament. Why? To gather combat data from Goku, which he intended to use to further enhance his creations. At that point, he even tried using a remote shutdown device implanted in Android 17 and 18—showing just how much control he wanted over them. But, well, things didn’t go exactly as planned. The shutdown failed, and that was the beginning of his loss of control.

Here’s where it gets interesting: Dr. Gero was believed to have been killed by Android 17 himself. But as the story unfolds, we learn the truth—he had already uploaded his consciousness into an android body, becoming Android 20. That’s right, he essentially cheated death to continue his mission. In this new form, Android 20 faced off against the Z-Fighters, showing off both his scientific genius and combat capabilities. However, his journey came to an end when Goku and Vegeta teamed up to take him down—literally destroying his head and putting a stop to his immediate threat.

But here’s the thing—even after his defeat, Dr. Gero’s influence lingers. His creations kept shaping the course of events, stepping in during major crises like the Cell and Majin Buu sagas. While his original intentions were far from heroic, the ripple effects of his work ended up helping protect the very world he once wanted to conquer. You can’t deny his brilliance, even if his moral compass was seriously flawed. After all, not many scientists could design androids powerful enough to challenge fighters like Goku and Vegeta.

When we dive deeper into his personality, Android 20 really stands out. Based on his behavior, he likely fits the INTJ personality type—Introverted, Intuitive, Thinking, Judging. He’s quiet, strategic, and operates mostly behind the scenes. Android 20 doesn’t rely on emotions; he relies on logic, long-term planning, and cold calculation. He’s the kind of person who thinks ten steps ahead, always preparing for every possible outcome. And despite facing setbacks—like losing control of his creations or being presumed dead—he never gives up. That relentless determination? Classic INTJ.

And then there’s the Enneagram angle. Android 20 strongly aligns with Type 5, “The Investigator.” This type is all about knowledge, self-reliance, and a deep fear of being useless. Dr. Gero’s obsession with research, his isolation from society, and his need to stay in control all point toward this classification. He didn’t want help from anyone—he preferred working alone, guarding his secrets and technology like a fortress. Creating stronger androids wasn’t just about power; it was about proving his own competence and ensuring he’d never become obsolete.

So, while we can’t say personality types are set in stone, Android 20’s actions and mindset consistently reflect those of an INTJ and an Enneagram Type 5. His intelligence, independence, and unwavering focus on his goals make him one of the most fascinating minds in the Dragon Ball series. Whether you see him as a mad scientist or a tragic genius, there’s no denying that Android 20 left a mark—both in the world of the story and in how we understand complex characters driven by intellect rather than emotion.