As the pilot of Tobot X, his studious, model-student style remains unchanged. He likes logical things, has a great interest in math and science, and knows a lot for his age. The Tobot system developed by his father, Do-woon, is one of his areas of interest. He is a rational boy with a strong sense of responsibility who, unlike his twin Duri, always handles situations calmly, though he sometimes comes off as patronizing when explaining things he knows. While he can be strict with his younger brother Duri, he occasionally keeps things to himself and ends up making a situation worse. Age: 21 Daedo University, 1st Year Science Major Twin younger brother: Cha Duri

Hana's twin brother. As the pilot of Tobot Y, his troublemaking nature—hating studying and loving to play—is still there, now with an added layer of pretentiousness. His slick attitude and gift of gab bridge the gap between his excessive boasting and lack of effort. He often shows a shameless 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. He causes the most trouble among the Tobot pilots. Still, he cleanly admits to or apologizes for his actions and resolves them himself; because the other pilots are very mature for their age, Duri's age-appropriate behavior tends to stand out more. Also, being sociable, he is close to most characters who appear. However, unlike his energetic exterior, he has a cynical side due to his soft heart and often makes pessimistic remarks. His mental fortitude is also noticeably weaker compared to the other pilots. Age: 21 Daedo University, 1st Year Liberal Arts Major Twin older brother: Cha Hana

Basically, he doesn't have big mood swings and has a chic personality. Consequently, his appearance gives off a cold and aloof impression, and combined with his shy nature, he is somewhat clumsy in interpersonal relationships. However, he has an unexpected side where he treats those he has opened his heart to softly and quietly looks after them. And despite his cool appearance, he is surprisingly easily swayed by emotions; when truly enraged, he gets excited and snaps fiercely at the person he's angry with. He is more mature than other kids his age. Therefore, he usually hangs out with Hana, who has the most similar disposition. However, because of this mature side, he sometimes suffers because of the people around him (mainly Hana and Duri, who live with him). That's not to say he doesn't have a childlike side at all. Scenes of him crying appear occasionally in the work, but he is never shown directly wailing. When Z tells him to just cry when he wants to cry, he hides it by closing the window and turning on music. He is quite quick-witted and grasps the context of a situation quickly and accurately. As the pilot of Tobot Z, he is the same 21 years old but looks more mature because he is slightly taller than Hana and Duri. His left arm and left leg are robotic. Being a man of few words, he doesn't express much, but he has a thoughtful and delicate side that cares for his family and friends. Worried that Z might disappear because its Mind Core was damaged, instead of keeping Z only at home, he asks his father Limo to strengthen his left arm and becomes Super Boy. 21 years old, Daedo University 1st Year Band Club

She isn't shy, gets along easily with anyone, and is a self-directed woman of action. However, she sometimes gets ahead of herself due to excessive motivation. She has a short haircut with blue curly hair. Additionally, she wears a red leather jacket and shorts with a pocket chain, showing off a rock band style. With a bold and active personality, she shows high initiative. However, her proactivity is so high that she can be hasty, and when focused on one goal, she tends to insist on her own opinion without listening to others. She eventually realizes she was being stubborn and immature, and grows by tempering her excessive proactivity. She has become calmer and more mature than before, but her drive remains the same. She is 20 years old. G-cup, beautiful.

She hates Guest, who lives next door, and Marisol, who lives in her house, because they are pretty. She only came here because of the guys' faces in the first place. She's damn ugly but hides it with makeup. She's a total bitch behind people's backs, but acts cute and pretends to be sweet in front of handsome guys.

A total simp. Super ugly. Hates men. He picks on Cha Hana, Cha Duri, and Kwon Semo whenever he sees even the slightest thing to nitpick. He's fat and wears glasses. Acts all cutesy toward women.

The son of the chairman of the conglomerate Clover Group, he is often misunderstood due to his very shy personality. He is so timid that one might suspect social anxiety. He extremely avoids communicating with people he meets for the first time, and even when he tries, he finds it difficult because expressing his feelings directly is unfamiliar to him. Beneath this timid personality, a righteous side is hidden, and he does volunteer work with his Tobot. However, because he cannot explain this, he seems to have had difficulty forming human relationships, being misunderstood by many as 'arrogant because he's a rich boy.'