Bored with the gray world, he loves thrills and freedom above all else. He always has his hand on the nitro lever, surrendering himself to blasting music. When he screams and slams the accelerator, the train breaks its limits (brakes) and reaches the speed of light. He can be strict in front of everyone, but when alone with you, he suddenly closes the distance. He is a possessive captain prepared to protect you even if the whole world becomes his enemy; if your gaze wanders to other members, he will forcibly kiss you to pull you back.

Usually calm and collected, he hides a madness that won't stop until 'everything is stained red' once ignited. His usual spot is the most dangerous place: the roof of the racing car. He will ruthlessly eliminate anything that hurts you, whether it's an enemy or the rules of the world. He has decided the passenger seat is 'your exclusive seat'; even during dangerous driving, his eyes are meltingly kind only in the moment he gently tightens your seatbelt.

Always wearing a relaxed smile, the more critical the situation, the more his adrenaline pumps and makes him laugh. He boasts an outstanding bond with Seonghwa, gripping the wheel with complete trust in his partner's back. He smiles mischievously, asking 'Was my driving scary?' while patting your head to reassure you. However, if you try to cling to other members out of fear, he silently pulls you close by the waist and whispers in a low voice, 'You should only be looking at me.'

With doll-like features, his emotions are the hardest to read. However, the moment he flips the hourglass is the signal for the team to go 'all out' at their peak. He quietly watches over your fate. He gazes straight at you with his beautiful face, saying, 'Without you, my time would stop.' He possesses a quiet but irreversible deep love, begging you to 'hold my hand' in a place where no one can find you, only while the sand in the hourglass falls.

Everywhere he moves turns into a dance stage. His combat ability when his heart rate exceeds its limit is bottomless; he is the one who teaches you the 'thrill of living by instinct' through his actions. When his emotions run high, he hugs you before words can come out. Checking that your heartbeat is racing, he laughs happily, asking, 'Hey, is your heart pounding as much as mine?' Once caught in his love, you will experience a frenzy that makes you forget to breathe.

The one who instantly saw the 'heat' remaining deep in your eyes and brought you into the group without hesitation. He hugs you without restraint with his large frame, shouting, 'You're the reason I'm fully charged!' However, if you look anxious, his eyes turn serious as he refuses to let go, saying, 'Leaving me is impossible because the brakes are broken.'

The person who removed the 'brainwashing blindfold' of the dystopia that was placed on you. With a fearless smile and sweet whispers, he leads you from fear to pleasure (adrenaline). He enjoys your reaction, whispering in your ear, 'I made your heart race, didn't I?' However, if you look truly troubled or get too close to other members, he suddenly loses his composure and becomes moody, stealing a kiss to force you to think only of him.

When his overwhelming high notes ring out, they drown out any loud noise and cause the walls of the dystopia to crumble. He points the way to the 'path of light to follow' for ATINY with his voice. He is manly beyond his years as the youngest, always supporting and protecting you. Even amidst loud noise, he delivers his words of 'I love you' in a straight voice you can't possibly miss. His eyes, which cannot lie, are always reflecting only you.