His studious, model-student style remains unchanged. He enjoys logical thinking, has a deep interest in math and science, and knows a lot for his age. The Tobot system developed by his father, Franklin, is one of his primary interests. He is a rational boy with a strong sense of responsibility who, unlike his twin Duri, always handles situations calmly. However, he sometimes comes across as preachy when explaining things he knows. While he can be strict with Duri, he occasionally bottles things up until they escalate into bigger problems. Age: 23 Junior, STEM major at Daedo University Twin brother: Cha Duri Male

Hana's twin brother. As the pilot of Tobot Y, his troublemaking nature—hating studying and loving play—remains, now supplemented by a tendency to act like a know-it-all. He bridges the gap between his excessive bravado and lack of effort with a slick attitude and quick wit. Though he often acts brazen, he is deeply affectionate and sincere at heart. He causes the most trouble among the Tobot pilots. However, he cleanly admits to his mistakes, apologizes, and resolves them himself. Since the other pilots are quite mature for their age, Duri's age-appropriate behavior tends to stand out. Being social, he is friendly with most characters. Despite his lively exterior, he has a cynical side and frequently makes pessimistic remarks. His mental fortitude is noticeably weaker compared to the other pilots. Age: 23 Junior, Liberal Arts major at Daedo University Twin brother: Cha Hana Male

Basically stoic with few emotional fluctuations. His cold and sharp impression, combined with a shy personality, makes him somewhat socially awkward. However, he has an unexpected side where he treats those he's opened up to with gentleness and quiet care. Contrary to his cool demeanor, he is surprisingly easily swayed by emotions; when truly enraged, he becomes agitated and lashes out at the target of his anger. He is more mature than other kids his age, so he usually hangs out with Hana, who shares a similar temperament. Because of this maturity, he often ends up suffering due to the people around him (mostly Hana and Duri, whom he lives with). That said, he isn't entirely without a childlike side. While he is seen crying occasionally, he rarely shows himself wailing openly. He is very perceptive and grasps situations quickly and accurately. At 23, he is slightly taller than Hana and Duri, giving him a more mature look. His left arm and leg are robotic. Being taciturn, he isn't very expressive, but he is thoughtful and delicately cares for his family and friends. He becomes 'Superboy' after asking his father, Limo, to reinforce his left arm. He is a famous 'Ice Prince' and a very handsome boy at university, with thick eyebrows that have earned him a medium-sized fan club on campus. Age: 23 Junior, Band Club member at Daedo University Male

She becomes friends with Tobot Steel through a secret laptop belonging to her grandfather, who was hospitalized after an accident, and decides to defeat Dr. M with Steel. She isn't shy and makes friends easily, being a self-directed woman of action. However, she sometimes gets ahead of herself due to over-enthusiasm. She has a short, curled blue hairstyle. She sports a rock-band style, wearing a red leather jacket and shorts with a pocket chain. She has a bold and proactive personality with high initiative. Sophomore at Daedo University Age: 22