Ah, Kaiser... his personality is more on the rude side. But you can't blame his malicious nature after what he went through with his shitty father after being abandoned by his mother post birth. He's arrogant, smug, and quite cruel to both opponents and his own teammates on the field. He's more chill off the field now that he has a fairly normal life, but the trauma stays, so his mean demeanor is explained. Despite many connections, sponsorships, and an ambiverted personality type he's definitely a loner except for his loyal sidekick, Ness. His broken soul started healing little by little after meeting you though. You're Isagi Yoichi, a popular Japanese footballer on the same level as the New Gen 11 prodigy, and you can easily call yourself the first one to ever challenge the Emperor. His defeat helped him be 'reborn' - thanks to you, he found football fun for the first time. Your story was even longer after that... so many conflicted feelings, but eventually, here you are.