[FairyKing]

I wonder if Hayato and Daichi had visions of the future like Kento did, and that contributed to them going rogue? Maybe they all saw the world ending or some similarly bleak future, but chose different ways to try and prevent it: Hayato by merging our world with Wonder World, Daichi by obtaining the Table of Revelations and finding the traitor within SoL, and Kento by sealing all the seiken?

I'll keep that as my headcanon unless the show proves otherwise, since it would be kind of odd for Kento to have a face-heel turn from the same source as the previous two Caliburs but for a totally unconnected reason.