Words cannot express how insanely much I love the relationship between Mydei and Phainon. It honestly feels like Hoyo went into their little character laboratory and created a dynamic specifically targeted at me. Okay so let's review:
Rivalry: Has to be mentioned since I live for rival dynamics (as my blog history will testify). There's just nothing better than two characters challenging each other with the hopes of surpassing the other. And the fact that they seem to be more or less equally matched in power. They'd probably consider sparring a valid form of foreplay.
Banter: The way these two flirt with talk to one another gives me life. Every interaction is perfect, with all the teasing and jabbing and general playfulness. And the best part is that it's reciprocal.
Genuine affection: Despite the way they talk, they very clearly care for each other and aren't afraid to show it in their own way. This is actually something that can often be lacking in rival dynamics, where the parties are by definition somehow opposed to one another. But these two navigate it beautifully. They may say they're both friends and enemies, but I think it's understood that they are friends who occasionally roleplay as enemies. (Until we get a moment where Phainon turns on us and Mydei has to beat him back to his senses. Not a prediction, but a girl can dream.)
Mutual trust: They obviously respect each other's capabilities and are willing to rely on one another, but it's not codependent. They work well together and they work well apart, and they trust that the other will manage. It feels really balanced too, since both parties clearly care about the wellbeing of the other.
Mutual understanding: They seem to have a deep understanding of how the other is feeling, even though they show it through convoluted means (like starting a competition to give the other the space they need but won't ask).
I just can't get over how perfect it is. Mydei waiting for you and Phainon during the competition to make sure you find your way through his hometown. Mydei being ready to concede his right for the final blow on Nikador as a result of the competition, but Phainon insisting on having a fair battle for it (because the whole competition was a pretense anyway). Phainon pointing out that Mydei would be better suited to carry the coreflame of strife even though it's been his life mission. (And on a sidenote, Mydei demonstrating silent wisdom by refusing the flame in the first place because he doesn't want to repeat past mistakes? King behaviour. I love him so much.) Phainon telling Mydei to skip his ritual to nurture his wounds, but then clearly being a little sad that Mydei is not there. And then Mydei showing up anyway because of course he was going to.
I probably missed half of what I wanted to say but god I just want more of these two, preferably injected straight into my veins.