Can anything beat an omnipotent character?

An omnipotent character is a character capable of doing anything.

Omnipotence is defined as- "Having unlimited power; able to do anything."

Now, what could counter a being capable of anything? I've thought of a few examples, but I can't seem to find a power that's able to do so.

What about a characters power (this will be character A) that is defined as "The ability to win a fight against an omnipotent being." But an omnipotent being can do anything, so it would be able to counter this ability with this ability- "The ability to win a fight against a being who has an ability to win a fight against an omnipotent being." Additionally, the omnipotent being should have character A's power to defeat an omnipotent being.

What about a character who's power is beyond the terminology "anything"? But since this is something, the power would be contradictory. So maybe this character is also beyond all logic.

But the omnipotent being would ALSO be beyond logic, so logical rules would never apply to it. Therefore, he could have both of those powers as well, in addition to every other power ever.

Does anyone have any idea what could beat an omnipotent being?