@Thoxi1026 There'd definitely a subtle character progression to Yugami throughout the series. One, he openly admitted to the possibility of friendship, albeit in the unlikely scenario of encountering aliens, which directly challenges his original philosophy that rejects the concept of friendship completely. Two, despite Yugami's denial, his continued interactions with Chihiro– particularly the effort he put into setting up those meetups– is at the very least what you'd expect of friends, even if you reject the even subtler romantic intimation.
And the same could be said of other characters. The brilliance of this series lies in the fact that its characters change and mature within their own capacities while remaining true to their core personalities (as is often the case in real life). Yugami is at his core, a talented but unsociable, and stubborn individual, and that's not going to change. However, he does learn to gauge the optimal modes of interaction with everyone else, to the extent that you'd notice there's far fewer unnecessary confrontations like the ones he initiated at the beginning of the manga.
And the same could be said of other characters. The brilliance of this series lies in the fact that its characters change and mature within their own capacities while remaining true to their core personalities (as is often the case in real life). Yugami is at his core, a talented but unsociable, and stubborn individual, and that's not going to change. However, he does learn to gauge the optimal modes of interaction with everyone else, to the extent that you'd notice there's far fewer unnecessary confrontations like the ones he initiated at the beginning of the manga.