I may be overthinking it... but. Consider the fact that we found out this week that someone among our number is a Foundation agent sent to watch us as we go through this hell. The notes we found indicate that this person is clearly still thinking about containing or destroying this entity but hasn't made any moves to assist in that endeavor--speaks to a king-type, doesn't it?

But in that case, the strongest pieces on the board would be people who are resistant to the influence of the miasma and the entity. Battler-kun objectively has a very powerful ability but when it comes to anything poking holes into what he understands to be reality, he collapses--fitting for a bishop, isn't it? A limited though far-reaching kind of ability.

But this concept alarms me because there is a black king putting the white king into check.