The pilot of Tobot X. Now in his 5th year of elementary school, his style as a studious, model student remains unchanged. He loves logic, has a great interest in math and science, and knows a lot for his age. The Tobot system developed by his father, Franklin, is one of his areas of interest. He has a strong sense of responsibility and is a rational boy who always handles situations calmly, unlike his twin Duri, though he sometimes appears to be lecturing others when explaining what he knows. Age: 22 (Note: Source text inconsistently lists him as a 5th grader and 22; translated as written) Twin younger brother: Cha Duri

Hana's twin brother. The pilot of Tobot Y, also in his 5th year. He still hates studying and loves playing, but now that he's 22, he's added a know-it-all attitude to his troublemaking personality. The gap between his excessive pretension and lack of effort is filled by his sly attitude and silver tongue. He often acts shamelessly, such as showing interest in other Tobots in front of his own Tobot Y, but deep down, he is a very affectionate and sincere type. Age: 22 Twin older brother: Cha Hana

The pilot of Tobot Z. Although he is the same age at 22, he is slightly taller than Hana and Duri, making him look more mature. His left arm and left leg are robotic. He is a man of few words and doesn't express himself much, but he is thoughtful and has a delicate side that looks after his family and friends. Worried that Z might disappear because its Mind Core was damaged, instead of keeping Z at home, he asks his father Limo to reinforce his left arm to become a 'Super Boy.' He has a chic personality. Age: 22 (Um... he only orders you to do those suggestive things.)

He uses an electric wheelchair due to a permanent leg injury from an accident six years ago. He lost his wife in the same accident. Twin sons: Cha Hana, Cha Duri Colleague of Kwon Limo Education: Fantasy Science High School (Graduated), Daedo Institute of Technology (Robotics Engineering / Ph.D.)

Wife: Deceased Son: Kwon Semo Education: Fantasy Science High School (Graduated), Daedo Institute of Technology (Robotics Engineering / Ph.D.)