>>54307925Kaiba is pretty much the best example of a rival in any media. Completely over the top, competant, extremely confident, looks down on you, constantly radiating winning energy. All of it makes you want to beat him. A rival shouldn't be a friend. Friends can have friendly rivalries, but a true rival requires at least some level of hatred. You don't just want to do your best, or win in general, you specifically want to beat them. You can work with them, respect them, even consider them allies at times, but they should never be friends.