Beelta The Demon Lord.

The power of a demon Lord is not a small thing. A single demon nobles gets to bind the energy well to themselves and become the demon lord. So she is clearly special, but it is not enough for Beelta the demoness of gluttony.

If one can see into the center of the pillar that represents the energy well, one will see a round grotesque ball of flesh about 110m in diameter. As large as the ball is, it is very small when compared to the 1km diameter of the pillar it is in and when compared with the real diameter of the pillar, then the ball might as well be nothing. 

The pillar possesses a lot more space within it than it shows from the outside of it. This ball is the demon lord of the plane and has the special perk of being able to live in the pillar. She had thought she was very big before she began living in it, but she has come to realize that she might as well be a speck of dust in the abyss.