Beskem was the primary Deity who protected the lands of Al'tehrun after the Primordials were driven away. In the Cabalum, they fostered strength through protection, encouraging cooperation and community to bolster security.
They intervened in the development of life on Al'tehrun greatly: they gave their protective blessings to Duvonte and Rookmore, they were the first to name a champion (Terrive) and grant them a boon of their power (Earthsplitter), they fostered the growth of the Giants. In observing their developments connected to the planes of Chaos as well as their hostilities with humanity (specifically Duvonte), they split their homeland and isolated the burgeoning subraces on the Isles of Reus.
Beskem bonded deeply with their creations, and was the most staunchly opposed to any forces which threatened that connection (destructive potential of unleashed Primordials, isolated future desired by the Rivers). Being rejected by humanity, with the creation of the Ends of Empyrean, was devastating. However, the act was recognized as necessary, after the destruction of the Cataclysm left no land unmarked.