FATE

Fate (aka FATE to avoid confusion with the concept which was also, created by FATE by adding a new law to causality) was originally the founder of the Kupo Clan and holds a power level that currently rivals that of the Dimensional Monarchs.

As a dimension monarch classed being, Fate can manipulate the laws which govern how lesser beings can manipulate causality and is not necessarily under the control of causality itself.

Fate is also, one of the beings that participated in the computation that resulted in the creation of the root theory itself along with contributing to this process by providing it's algorithm to the supercomputer known as Shara which is said to be one of the most powerful in the multiverse.

Fate also, saved the multiverse from a possible disaster by taking on the holder of the ultimate nullifier which had the capability of erasing the multiverse itself (it has been argued though that another powerful being would have intervened however) and the artifact itself was overpowered by Fate's sheer power alone.