Honestly, he's an unpleasant guy in a lot of ways so that's what's worth discussing first and foremost. He is arrogant to the point of pure delusion, extremely self-centered, manipulative, violent, rude, inconsiderate, and easily-angered. I could keep going, but instead of just listing adjectives forever I'll go into a little more detail to illustrate just what a charmer he is.

Highlights include throwing a football at a child in a wheelchair, sabotaging his team in order to make himself look better, severely beating (multiple) street gangs, attacking other players on and off the field (judo chops and dislocation), stealing a car, planning to wreck that same car not five minutes later while at high speed in order injure or kill two of his teammates in the back seat (while helpfully mentioning that since he himself is the only one with an airbag, it'll be fine), assaulting the lead female after she refuses his advances, ensuring that certain main characters cannot go to his school to play football entirely out of spite, and threatening death upon a good half of the people he meets. Also, one of the extra pages reveals that he made a pushy scout disappear mysteriously, and the man still has not been seen since. Um.

As I've referenced before, the most central aspect of his character is his innate talent and the effects that this has had on his psyche. He says repeatedly that all he wants to do is beat down those who have less talent than him and seems genuinely disgusted by the idea of people improving through hard work. The only person that he recognizes on his team as being useful is Ikkyuu, another player who is acknowledged as a genius, though even to him he's disrespectful. He's quick to defend himself and his ego, repeatedly thinking in his matches that if he didn't have to play with such trash then he would be doing much better. This pride is something that is used against him by Hiruma, with the latter having little trouble in provoking him into a rage.

He also genuinely just seems to be a sadist, getting clear pleasure from the misfortune of others and stating more than once that he just enjoys crushing people's spirits completely. When Sena first speaks with him he describes Agon as being nothing like just a delinquent, but rather says he feels that he has just come into contact with pure evil.

To add to his already glowing list of positive qualities, he's also a vain ladies' man. The vanity is shown by the fact that he's constantly changing his hair (he likes to dye it blond when it's not in dreads) and complains about having to wear clothing he doesn't find stylish. As for the ladies' man bit… Well, it's rare to see him off the field and not with a woman. He has no trouble getting one on his arm whatsoever due to his exceptional social skills (read: ability to lie), and frequently is seen with more than one at a time. One of the reasons he's willing to help Hiruma initially is because Hiruma would introduce him to women in return… which doesn't stop him from insulting these women, acting violent towards them, and moving on after one night. An extra page states explicitly that he's never had a girlfriend, just a lot of girls.

With all of this said, he does care about his brother as is shown in the Youth Cup. I was going to put more positive qualities here but I can't think of any.

His most notable ability is referred to in the manga as his "God-speed Impulse"; essentially his reaction time pushes the limits of human capability. The catch is that he has to see his opponent in order to respond, though this is only a problem for him twice. Because of this reaction time (which is said to be impossible to attain through hard work) he is also extremely good at picking up on techniques or plays and is shown to copy complex maneuvers after only seeing them once. This extends to other areas of his life, such as learning to ride a bike and also to driving a car evasively (to escape police, imagine that).

Aside from this he is highly intelligent and very athletically gifted, alongside having great social skills when he actually feels like trying. He's also a good guy to have in a fight, seeing as how he has a lot of experience in street brawls and is never seen to take a single hit in one. His record for the 40-yard dash is 4.6 seconds and his bench press is 130 kg/286.6 lbs.

His trademark Oakley Juliet sunglasses are a must, of course. Aside from that he’s likely to have his wallet and (if permitted) a few marijuana blunts.