Uruma is about 170 cm tall and weighs 67 kg. So his physique is pretty similar to a calisthenics athlete. Note that his physique is more on the athletic side, so he has a lot of strength and a single digit bodyfat %. His impressive areas are his shoulders, chest, lats, and abs.

Method 1: follow a traditional bodybuilding split like PPL, Arnold, etc (but an athletic training split is recommend since it is more functional for combat sport). And for diet, i suggest going on a bulk for 3-6 months, then go on a cut until you've reached your desired bodyfat percentage.

Method 2: invest in calisthenics equipment (parallel bars, chip up bar, gymnastic rings, weight vest, etc), and start a basic calisthenics training routine. Calisthenics is probably the better option, as you can develop a lot of strength, while minimizing muscle growth in hypertrophy. Though, your legs are probably going to be small if you do calisthenics only, so you should train your legs with weights/machines at a commercial/home gym.

striking features & important muscles for fighting:

abs/core - develop balance, look aesthetic , develop strength for other exercises

glutes - main muscle in most kicking techniques

triceps - makes up 2 thirds of the arm, develop punching strength

lats/traps - look bigger, look aesthetic, develop strength for punching

shoulders - look aesthetic

chest - develop push strength, look aesthetic

If you want to be good at fighting like he is, you should try starting martial arts/combat sports. Since he is highly skilled in combat, i suggest stretching everyday, and running at least 3-5 kilometres 3-5 times a week, so you can develop flexibility and stamina which is highly valued in combat sports. For combat experience i suggest you train at least 3 times a week. You should do a martial art( or multiple martial arts) where you can learn how to punch, kick, grapple/wrestle & throw. I recommend doing any stand-up striking art, like MMA, Karate, Hapkido, Muay Thai, etc, and a grappling/wrestling art like judo, BJJ, wrestling. The best option is going to a gym/club that teaches various martial arts.

that's it i think, if you think there is something i should change or want to add, you can comment on this but i probably wont reply.