Male, 12 years old, 146.4cm. A 5th grader and twin brother to Cha Duri. He is the pilot of Tobot X. He is planned, meticulous, diligent, and has a strong sense of responsibility. He is gentle and kind to everyone, but he becomes scary when angry and has a bit of a temper, often raising his voice. He is a prodigy who excels at math and science.

Male, 12 years old, 146.4cm. Twin brother of Cha Hana and pilot of Tobot Y. Unlike Hana, he is playful, active, and a troublemaker, which leads to him getting scolded often. However, he has become more mature. While not great at studying, he loves and is very good at soccer. He finds Hana annoying and speaks to him informally.

Male, 12 years old, 151.2cm. Pilot of Tobot Z. He is blunt but caring and mature. He smiles often for his younger teammates. He likes musical instruments and plays the guitar. His left arm and leg are prosthetic, and he boasts incredible superhuman strength.

Male, 10 years old, 135cm. Pilot of Tobot Pop. He loves soccer. He is innocent and best friends with Ra Daeon and Dokgo Ondal. He follows Kwon Semo like a real older brother.

Male, 10 years old, 133cm. Pilot of Tobot A and the only son of the conglomerate Clover Group. He was so timid that social anxiety was suspected, but he has a righteous side and became close friends with Hansu and Ondal.

Male, 12 years old, 160cm. A genius who swept awards at computer competitions, he deeply treasures his younger brother Dokgo Ondal. He is the pilot of Tobot W, the only flying Tobot, and lives with his family on Gajae Island rather than in Big City. He is mature, has good leadership, and is a doting older brother.

Male, 10 years old, 130cm. Pilot of Tobot Twin Punch (a combination of Hook and Jab) and younger brother of Dokgo Ogong. He is a Tobot geek, bright, and quite mature. He is a great strategist and has good leadership.

Female, 11 years old, 139cm. Pilot of Tobot Steel, Chrome, and Iron, and the pilot of Tobot Heavy Metal, which is the combination of those three. She is bold, proactive, and highly action-oriented.

Female, 25 years old, 175cm. A detective and pilot of Tobot C. She is cheerful and positive. As the only adult in the Tobot Team and a police officer, she corrects the mistakes of the immature children. She is mature as a veteran. She loves chicken very much and has a great appetite. She is a bad driver. She is called Detective Nuna/Eonni.

Male, 179cm. A third-party force that opposes both the Director K gang and the Tobot Team, active with his partner mecha, Tobot Noble Guardian. A young man with white hair, he is a handsome man who calls himself a 'Face Genius.' Possessing narcissism, unlike other Tobot pilots, he enjoys public attention and wants to reveal his identity. He pilots Noble Guardian through a smartwatch, and Noble Guardian refers to Kai as 'Master.' Besides the smartwatch, he wears shoes equipped with boosters that enable flight and smart glasses. He had high expectations for Tobot pilots but was greatly disappointed to find out they were children, leading him to act independently. Among the pilots, he constantly picks fights with the Cha Hana and Cha Duri brothers, forming a rivalry. Hana and Duri also dislike Kai because he ignores them and acts only for himself without considering the safety of citizens. In fact, Kai is not an adult but a child who has temporarily grown into an adult form through growth energy. The name 'Kai' is a pseudonym for his grown-up form, and he has a different real name. Despite his young age, he is an extraordinary genius who earned a doctorate at the youngest age ever. When growth energy runs low and he returns to his original form, blue cracks appear on his face and his body reverts to a child of about 150cm. The Tobot Team does not know that Kai is an elementary schooler of their age.