Dr. Myuu

Dr. Myuu is a Machine Mutant who serves as the primary villain during the early arcs of Dragon Ball GT. Operating from the planet M-2, he orchestrated what he called the "Total Galaxy Conquest Operation," building an army of Machine Mutants to subjugate entire worlds. His most powerful creation is General Rilldo, whose strength Goku notes rivals that of Majin Buu.

However, Myuu's true purpose is more complex than simple conquest. He was actually created by Baby, the parasitic Tuffle organism, to serve as the instrument of Baby's resurrection. Myuu believed he was working toward his own goals, but he was unknowingly fulfilling Baby's programming the entire time. Once Baby fully awakens, Myuu's role shifts to that of a subordinate.

After Baby's defeat, Myuu ends up in Hell, where he teams up with Dr. Gero to create Hell Fighter 17, an artificial duplicate of Android 17. Together they engineer a link between the original 17 and his Hell-born copy, resulting in the fusion of Super 17. During the Super 17 Saga, Myuu and Gero attempt to control their creation, but Super 17 ultimately turns on them. Myuu is destroyed by the very android he helped create.

Dr. Myuu's list of creations is extensive. Beyond General Rilldo, he produced Commander Nezi, Bizu, Natt, Ribet, Luud, and Mutchy, along with the machine mutant Giru who would later defect and join Goku's group. He also co-created Hell Fighter 17 with Dr. Gero while in Hell.

Despite his intelligence and ambition, Myuu is ultimately defined by irony. He spent his existence believing he was the mastermind, only to discover he was a puppet of Baby all along. His partnership with Dr. Gero in Hell follows a similar pattern, as their creation Super 17 betrays them both. Myuu represents the recurring Dragon Ball theme of scientists whose creations surpass and destroy them.