yu

Boxing Prodigy: After spending two years doing only strength training and watching videos of boxing championship title fights,[6] Yu was still able to display prodigious skill in his boxing debut. During his fight with John Taker, Yu was able to deliver a series of ridiculously fast and accurate jabs, to the point that the ringside doctor checking the cuts on John's face was impressed by the perfection of the cuts, despite them being made with boxing gloves. He is capable of copying techniques and improving

Immense Speed ​​and Agility: Yu possesses superhuman speed and agility. Professional boxers cannot see his punches approaching, only realizing they have been hit afterward. Even world-class boxers like Jean-Pierre Manuel have had difficulty dodging his blows, managing to avoid only a few. His agility, combined with his superhuman temporal perception, makes it impossible for anyone to hit him while dodging his punches, even for world-class boxers.

Enhanced Stamina: Yu possesses a vast reserve of energy, honed through two consecutive years of stamina training to prepare for professional fights. He is able to dodge continuously during combat and deliver a flurry of punches without showing fatigue.

Intimidation: When K describes his first encounter with Yu, the legendary trainer comments that his first impression was one of pure fear. After finally becoming a professional boxer, his visibly intimidating presence manifests itself in the minds of those who face him; John Taker, an experienced and dominant boxer in his own right, was impressed by Yu's aura, imagining him as a giant weapon when he faced him.

Natural Intuitive Physical Aptitude: Yu has demonstrated a remarkable ability to assimilate and replicate physical actions, such as boxing techniques, with impressive speed and efficiency. Having learned only the basics, Yu already demonstrated great physical aptitude.

one-two combination
On one occasion, [1] Yu was able to execute the punching technique with surprising effect several times on his first attempt. [4] Immediately afterwards, he completely destroyed Ryu Baeksan [5] despite having no formal training in boxing (or any martial art) and Ryu being considered to have world-class boxing potential by K himself.

Yu is a deceptively athletic individual. It was revealed that he was actually very good at sports in his physical education test, but he told Injae that he didn't participate because he found it boring; shortly after this conversation, Yu casually catches a ball in the air with one hand that Ryu Baeksan had kicked into Injae's head,[3] showing his hidden athletic prowess.

Inhuman Temporal Perception: Yu's most evident characteristic is his seemingly superhuman perception.

temporal perception
and the

kinetic vision
that accompanies him. When K first tested him, delivering a deadly punch from behind, Yu not only easily dodged the blow in minimal time, but also casually followed K's fist with his eyes as he did so; according to K himself, it's not just about reaction time, but rather that Yu lives in his own "

time dimension
With his incredible temporal perception and kinetic vision, Yu is able to react instantly to blows and avoid them with minimal effort, even from those who possess incredible combat skills.

Parry: Thanks to his sense of timing, Yu has a great habit of dodging, managing to track the trajectory of his opponents' punches and deflect them with relative ease.
Precision: Thanks to his temporal perception, Yu is able to deliver punches with incredible precision and dexterity, being able to alter the trajectory of the blows during execution and ensure that the punch causes maximum damage, even injuring another boxer by hitting the weakest part of their fist with the strongest part.
Enhanced Strength: Despite having a slender build and being able to deliver very powerful punches, Yu inflicts severe damage, and can even knock out professional boxers with a single blow. He has been seen tearing holes in their punching bags, destroying several in the process.

Yu possesses a surprisingly apathetic and disinterested personality, showing little to no interest in anything other than his pet cat. He is alarmingly apathetic, simply absorbing blows without bothering to dodge them [1] and not reacting when threatened by an obviously violent person. [2] However, after his encounter with K and seeing Injae trying to fight Ryu Baeksan, he becomes interested in boxing after asking if hitting people was fun.

He doesn't seem to understand how to experience life or what it means to be human.

He has a very somber and melancholic appearance, with messy black hair falling loosely over his head, distinctly coal-black eyes with even darker pupils, and a completely disinterested facial expression, with an equally "dead" look. He has a very thin body, which contradicts his deceptively high athletic abilities.

After being taken in by K, K changes Yu's hairstyle to a spiky style (in the typical shōnen protagonist style). After training with K for two years to become a professional boxer, Yu gained lean muscle mass.

Furthermore, after approximately another 2 to 3 years, Yu gained significantly more muscle mass and seemingly changed his physique. Before reaching the heavyweight division, Yu was apparently an ectomorph, someone very thin and with a slender body structure. However, with his intense training, he came to appear to have a quite muscular mesomorphic body structure.