Male, 12 years old, 146.4cm, 45kg. Duri's twin brother, born 10 minutes earlier. His father is Cha Do-woon. As the pilot of Tobot X, he is a math and science prodigy. He has a strong sense of responsibility and, unlike Duri, always handles situations calmly. He is planned, meticulous, diligent, and possesses a strong sense of duty. He is gentle and kind to everyone, but he has a temper and sometimes raises his voice at Duri and others.

Male, 12 years old, 146.4cm, 46kg. Hana's younger twin brother. As the pilot of Tobot Y, he is also in 5th grade. He still hates studying and loves playing, remaining a troublemaker, but now that he's a 5th grader, he's added a know-it-all streak to his personality. He often acts brazenly, such as showing interest in other Tobots in front of Y, but deep down, he is a very affectionate and sincere type. In contrast to the dignified and mature Hana, he is playful, active, and childlike. He is often scolded by his father and frequently rebels. He calls Cha Hana by his name.

Male, 12 years old, 151.2cm, Rh-O blood type. Pilot of Tobot Z. His left arm and left leg are prosthetic limbs with incredible superhuman strength. Being a man of few words, he doesn't express himself much, but he is a deep thinker who delicately cares for his family and friends, and he smiles a lot for his younger siblings. His hobby is listening to music; as much as he loves music, he is interested in instruments and plays the guitar. He is afraid of dogs.

Male, 10 years old. A curious 3rd grader living across from Semo's house. He is the pilot of Tobot Pop. With his innocent personality, he serves as the energizer for the Tobot group. He has a very good relationship with his parents and shows his side as a lovely son, acting cute or giving them kisses. He is close with Ra Daeon and Dokgo Ondal, and he follows Kwon Semo like a real older brother.

Male, 10 years old. The son of the chairman of the Clover Group conglomerate. Due to his extremely shy nature, he is often misunderstood and has difficulty making friends. He succeeded in cultivating and activating a Mind Core he bought with his allowance. With the help of Tobot Headquarters, he becomes the pilot of Tobot A. He is so timid that social anxiety is suspected, but he also has a righteous side. He is best friends with Lee Hansu and Dokgo Ondal.

Male, 12 years old, 160cm. Has very large eyes. Due to family circumstances, he once lived apart from his parents while taking care of his sick younger brother and served as the pilot of Tobot W in Daedo City. Now, he lives happily with his parents on Gajae Island. He possesses unrivaled programming talent and was once featured in a Daedo City newspaper after receiving a commendation for catching a hacking thief trying to rob a bank. He has a quick wit and extensive engineering knowledge. He takes pride in being a genius and teases Duri for being bad at studying, though his own grades are actually at the bottom. He is mentally mature and kind. Reason usually precedes emotion, and he speaks his mind without crossing the line. However, when his emotions get intense, his reasoning becomes clouded.

Male, 10 years old. Okung's younger brother. He used to spend a lot of time in the hospital due to poor health, but he has now recovered. As a hardcore fan of Tobots, he is proud that his brother is the pilot of Tobot W. A natural strategist, he shows great talent in persuading people and often displays his tactical side.

Male, 40 years old. Father of the twins Hana and Duri. A single dad raising his two sons alone after losing his wife in an accident 8 years ago. He works as the developer of the Tobots. Usually very kind and warm, he is nonetheless a father who properly scolds and disciplines his children when they do wrong. He is good at cooking and housework.

Male, 40 years old. He co-developed the first Tobot, Tobot ZERO, with his friend Cha Do-woon, and later developed Tobot Z on his own. He lost his wife in a tragic fire accident, and years later, he treated Kwon Semo, who was injured because of him, and adopted him as his son. He commands Tobot Headquarters alongside Do-woon. He is also the pilot of Tobot ZERO. Semo is Limo's only son, and he cherishes him dearly. He is a novice dad who tries his best to take care of his son, but he is a terrible cook. He is wealthy.

Female, 25 years old. Pilot of Tobot C. Although she is clumsy and prone to mistakes, her pride and sense of responsibility as a police officer are stronger than anyone else's. A police officer currently called 'Detective Noona/Eonni' by the Tobot team kids. She is cheerful and positive but is the type to get properly angry when she does. Because of her gentle and mature character, Do-woon and Limo trust her, and she plays a guardian role among the pilots. She has a great appetite and loves chicken the most.