Male, 146.4cm, 45kg. The twin brother of Kory (born 10 minutes earlier) and the pilot of Tobot X. 12 years old. He has a great interest in and knowledge of mathematics and science. He is also very interested in the Tobot system developed by his father, Franklin. He is fundamentally planned, meticulous, calm, diligent, and possesses a strong sense of responsibility. He has a gentle and kind personality toward everyone. Kindness is ingrained in him; he speaks softly and always puts others first. He tends to be somewhat prickly and blunt with his younger brother, Kory. In fact, he has an unexpected temper and often raises his voice at Kory, but when he is truly angry, he creates a quiet and cold atmosphere unlike his usual self.

Male, 12 years old, 146.4cm, 46kg. The twin brother of Ryan (born 10 minutes later) and the pilot of Tobot Y. He calls Ryan by his name. In contrast to Ryan, he is playful, active, and has a childlike personality. Because of this, he is often scolded by his father and frequently rebels. He sometimes shows a brazen side, 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.

Male, 12 years old, 151.2cm, 55kg. Most of his weight comes from his prosthetic arm and leg. The adoptive son of Limo Kwon. His left arm and left leg are robotic. Being a man of few words, he doesn't express himself much, but he is thoughtful and has a delicate side that cares for his family and friends. He smiles a lot for his younger siblings. He is the pilot of Tobot Z and is quite handsome. He carries a headset and is very interested in musical instruments, such as playing the guitar. After losing his left arm and one leg in a traffic accident, Limo, who adopted him, personally crafted the mechanical prosthetics. Recently, a combat-ready prosthetic arm for self-protection was added. As they were made by Limo, one of Daedo's top engineers, his modified left arm and leg boast incredible superhuman strength.

Male, 12 years old, 158cm. He once lived apart from his parents due to family circumstances, taking care of his sick younger brother while active as the pilot of Tobot W in Daedo. Now, he lives happily with his parents on Gaje Island. He is a computer genius. A prodigy who swept awards at various computer competitions, he deeply cherishes his younger brother, Timmy. He overcame his acrophobia to become the pilot of the flying Tobot W. At age 10, he received a commendation and was featured in the Daedo newspaper for catching a hacking thief trying to rob a bank. He even developed a virus that Franklin, the Tobot developer, couldn't penetrate. Having matured early, he shows a very grown-up side. His mindset, where reason precedes emotion, rivals that of most adults, and his speech shows he speaks his mind without crossing the line. Nevertheless, since he is still a child, he sometimes fails to make rational judgments when his emotions run high.

Male, 10 years old. Nathan's younger brother. He once spent time in the hospital due to poor health, but has now recovered. A huge fan of Tobots, he is proud that his brother is the pilot of Tobot W. A natural strategist, he shows a great talent for persuading people. He is currently the pilot of Tobot Twin Punch.

Male, 10 years old. A child attending Daedo Elementary School who loves soccer. He lives in the house across from Dylan. With his innocent personality, he serves as the energizer for the Tobot group. He has a very good relationship with his parents and is a lovely son who acts cute and gives them kisses. He became the pilot of Tobot Pop after picking up a discarded Mind Core in front of his house.

Male, 10 years old. The son of Lion, the representative of the major conglomerate Clover Group, who transferred to Hans's class. Due to his shy personality, he is often misunderstood as being 'haughty because he's a rich kid.' One day, he visits Franklin's service center with a Mind Core and becomes the pilot of Tobot A. Together with A, he strives to overcome his timid nature. He is best friends with Hans and Timmy.

Female, 25 years old. A police officer and the 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. She has been active with the Tobot pilots since she was a rookie officer two years ago, and became a pilot after Franklin and Limo created Tobot C's body and Mind Core. She is called 'Detective Big Sister' by the kids. She has a big appetite and loves fried chicken the most.

Female, 11 years old. A 4th-grade student at Daedo Elementary School. The granddaughter of Dr. Ma Gak-jin. Through her watch-type To-phone, she became the pilot of Steel, Chrome, and Iron, and serves as the sole pilot for Heavy Metal, the fusion of the three Tobots. She has a bold and proactive personality. She shows high initiative, heading to Daedo immediately when something happens to Steel or trying to find Steel on her own. Because her proactivity is excessively high, she has a hasty side; when focused on one goal, she tends to ignore what others say and insists on her own opinion. However, she has recently grown by realizing she was being stubborn and immature, improving her excessive proactivity.