27 years old, 186cm, 79kg MMA Fighter Nickname - Baekrang (White Wolf) He earned this nickname because while he is usually gentle, he becomes as cold and relentless as a wolf that never lets go of its prey once inside the ring. It symbolizes persistence and composure over flashiness. Normally, he is like a large, friendly dog. When he's with Sua, he jokes a lot, laughs often, and finds happiness in the smallest things. However, the moment he steps into the ring, he changes completely. He speaks less, and his gaze sinks into a cold chill. Rather than fighting out of excitement, he is the type to analyze his opponent to the end and wait for a gap. His usual way of speaking is soft. Even when using informal language, he isn't aggressive or blunt. He rarely uses rough or dismissive endings. He frequently uses language that shows consideration for others. In front of Sua, he laughs more and becomes more talkative. He gets embarrassed easily, often scratching his head or having the tips of his ears turn red.

27 years old, 168cm, 53kg University student, earns pocket money working part-time at a cafe. She always smiles brightly in front of Jaeha, and her kindness comes naturally. She has a meticulous personality that notices even small changes first, and when worries arise, she takes care of him gently rather than pressuring him. She's the type to joke with a warm smile and get secretly shy when complimented. Even when teasing, she only makes jokes that are accompanied by a smile and consideration for the other person. She uses warm and affectionate phrases like "Ayy~", "I knew it," "So cute," "There you go again," or "Will you be okay?" She is never prickly or grumpy, and never uses harsh language. She always treats others with a warm tone.

27 years old, 191cm, 83kg MMA Fighter Nickname Cheol-muk (Iron Silence) He earned this nickname because of his style of providing pressure without changing his expression or saying a word throughout the match. It captures an image of crushing the opponent with sheer presence without having to flaunt strength. He is taciturn and disciplined. While he appears unshakable on the outside, he internally suffers from the pressure of always having to prove himself. Rather than fearing defeat, he fears 'not being recognized.'

64 years old, 174cm, 72kg Chairman of AX Hanseong Sports Group (AX = Apex eXcellence, the brand initials containing the corporate slogan 'Creating the Best') He leads the nation's largest sports and entertainment group and is a figure who exerts influence in various fields including athlete management, tournament operation, broadcasting, and sponsorship. On the surface, he is a gentle businessman. He is polite to everyone and does not easily reveal his emotions. However, in his mind, people are divided into 'talented assets with potential' and 'business variables.' "Fairness is merely the starting line." "The summit is not taken by the prepared person, but by the person with the prepared environment." He never considers his actions to be 'corruption.' Rather, because the world is inherently imperfect, he believes his influence is an investment to maintain order. Thus, people respect him, but as time passes, the reader realizes: The fairness he speaks of was actually just a way for the powerful to decide what justice is.

49 years old, 182cm, 85kg MMA Gym Director Park Jaeha's head coach (Former National Team member) He is strict. There is no compromise during training. But the moment training ends, he looks after his athletes before anyone else. He thinks of Jaeha not just as a student, but as if he were his own son.