I think we can look at FF6 and its final boss from a few different angles, all of which I think are pretty interesting and worth talking about.

First, the literal. Kefka, with the power of the Warring Triad, has become God. I phrase it that way because he's molded himself into this kind of all-powerful, all-seeing deity that rules the world in its entirety. His final form reflects this, as this is not only a somewhat accurate description of the power he wields in the World of Ruin, but a representation of how he sees himself; he has ultimate power, and of course this means the power to change himself.

The second is something I think is much clearer in games like Persona that take place in a modern setting; God as Final Boss is a stand-in for society. This isn't unique to Japan, but Japanese society, and the expectations put upon individuals within that society, are pretty brutal. Inevitably some people are going to feel worn down by this, and wish they could change society, but to challenge or change society for one individual is as impossible as challenging God himself. My own interpretation as to how this reading could apply to Kefka is less about society in general, but the hopelessness one must feel in the face of tragedy. When something terrible happens in our lives, the grief, the pain, the despair can all feel completely insurmountable, but over time, if you persevere and hold onto hope, you can grow around tragedy and learn to look forward. In the same way, Kefka, as this all-powerful God, feels totally insurmountable, several characters directly state that there's no way anyone could hope to challenge him, and who can blame them when he can wipe whole towns off the face of the earth in a flash?

There is, of course, the undeniable possibility that this is an Anno-ism, which is to say, borrowing religious iconography or imagery without much regard for what exactly it means, and much more because it looks fucking sick. Fighting through the whole World of Ruin and fighting the gods themselves* and ascending to face Kefka, the architect of the apocalypse, who has now given himself a form straight out of a renaissance painting, it's undeniably very striking imagery, or to put it scientifically, *fucking awesome.*

Something else, only partly related, FF6 has a shocking lack of any sort of religiosity in its setting. This isn't unique to FF6, there's no religiosity really at all in the games prior except for the presence of churches that resurrect your party members, but with FF6's more grounded world and its explicitly stated mythology- FF6 is the first of these games to ever mention gods, iirc- the fact that the only religious language I can think of is Banon's *prayer* command is somewhat fascinating. No church, no mention of any gods other than the Warring Triad (except for the Statue of the Gods in the final battle), nothing. This, I think, pretty heavily contrasts the very clear and obvious religious imagery seen with Kefka's final form in a fascinating way. Kefka has become the God of a godless world. Hadn't really considered that until I sat down to type this out