Michael was a very talented martial arts student, whether its his quirk, natural physique, his personality or his natural talent in martial arts. He took to martial arts like a fish to water, it almost seemed he was born for it. Haruto thought it would be an enormous waste to focus on just one martial art, he might quickly become a master at it but it would be a waste of his massive potential, he has the potential to take the best of every martial art and use them to create his own. The dojo had a number of masters of different martial arts, Three different forms of Jujitsu, them being the standard Jujitsu, Aikido, and Brazilian Jujitsu. The dojo also had masters of Taekwondo, Wing Chun, Judo and Muay Thai.
Michael was a special student in that once he learned a martial arts move, he would be able to adapt it into his fighting, and would rarely ever forget it. This caused him to fight beyond his age group, even past his friend Mashirao Ojiro who was also considered one of the most talented students in the Dojo. He started to practice with students in their pre-teens, after only two months of training, both due to his natural strength and talent. He might lose more than he wins currently, but the speed at which he improved meant that he would be able to hold his own against them within a month. Seeing a four year old who has only practiced martial arts for two months defeat students who had studied martial arts longer than he has lived started a terrifying train of thought 'If he kept improving at this pace, how good would he be once he's mȧturėd? Forget mȧturėd, he might be able to hold his own against masters once he's 15.'
He rotated between teachers, one for each martial arts, going to the dojo for 3 hours, 7 days a week. Jujitsu would teach him how to block and counterattack, Taekwondo would make his kicks a force to be reckoned with. Aikido would teach him to take opponents down without causing too much damage, which would be useful for him as a hero, to make sure he doesn't injure weaker opponents when there is no real need to. Wing Chun teaches him balance, as well as how to block and strike more effectively, making him more deadly in close range situations. Judo would teach him positioning, as well as training his sense of urgency in fighting, as just one mistake could cost you the fight. Muay Thai would teach him how to be deadly, if it ever came to fighting an opponent you could not hold back against, this is what he would be able to fall back on, essentially turning his body parts into weapons and taking his opponent down no matter the cost.
Ideally, this would create a very well rounded fighter, who would be able to react and adapt to any situation and defeat most, if not all of their opponents, but realistically the amount of talent and effort needed to create this perfect fighter is immense. Michael was probably one of the few, if not one of the only people to be able to practice this. The majority of people only focus on one or two martial art styles and focus on improving them. Yet Michael was being taught seven, if he is able to adapt and make use of them all, he would become one of the best fighters in the world. If not, then he would be defeated by a large amount of martial artists instead, as specialization would definitely be the better choice in that case. With Michael's talent however, it is a definite possibility he would be able to master each of these martial arts to the level of a master.
Michael was currently sparring with a 12 year old, and was able to defend himself properly, but unable to make any offensive moves without his opponent taking advantage of the opening to defeat him. The 12 year old sent a kick toward the left side of Michael's face, hoping to end the fight then and there, Michael blocks while ducking and grabs the 12 year old's leg. The 12 year old used this to send another kick towards Michael with his other leg. Michael bȧrėly dodges the kick before sending a kick of his own to the 12 year old, a kick that landed before dropping the 12 year old to the ground and pinning him to the mat. He had defeat yet another student much older than him.
He returned home and started practicing using his quirk, something he does every day after returning from the dojo to replenish his energy and strength before attempting to enhance both his strength and speed with his quirk once more. Something he just could not achieve yet, he believed it may have to do with what the Rebirth Station mentioned about only getting the complete abilities of the Kryptonian pack when he reached the age of 18.
He noticed he really wasn't as strong as a kryptonian of the same age, which would probably be rectified once he reached the age of 18. He could only use Super speed, Strength and heat vision. He noticed the enhanced talent pack however was being fully into use, as his talent in everything skyrocketed. He could also tell his intelligence was growing massively, probably due to the enhanced talent pack as well as the super intelligence part of the kryptonian pack. He also had a weakened form of invulnerability, he could also leap at least eight meters and land perfectly fine.
Considering he was only four years old, almost five. This was incredible progress. He couldn't wait to reach puberty, his powers would probably grow massively along with his body, until he reaches the age of 18 and his powers reach their full potential. While he was currently very powerful, it was only for a kid, he wouldn't be able to hold his own against any pro hero, or even any half decent villain, but it wouldn't be long until he was probably the most powerful being in the planet.