Azanism
Azanist religions hold Azane, as represented by the sun, to be the primary creator god. Most Azanist religions hold Vehira to be a secondary deity, and the mother to the Siblings, though there are considerable differences in how individual religions and sects consider Vehira's role.
The Azanist religions first arose in Golanicja, eventually spreading to Marcosta and Obersch. In antiquity, these early Azanist religions did not have a concept of Vehira, or any secondary creator (though most seem to have recognized the Siblings in some form or another as secondary divinities). This is not surprising, as Vehira is not visible in the sky in these parts of the world.
Possibly as early as 1300 BCB Vehira starts to appear in Azanist religions, typically as a consort and mother to the Siblings.
By the Fourth Epoch, within the major Azanist religions, Vehira typically holds a place as Azane's consort and mother to the Siblings, and is typically on par with the Siblings in terms of power and importance. There are, however, a small number of anti-Vehiran sects (most often radical off-shoots of Azanist religons) that denounce Vehira in one way or another.
On the side of Tear where Vehira is not visible, these anti-Vehiran sects are more moderate, typically presenting as orthodox Azanists who deny the existence of Vehira at all - even actually denying that there is a planet visible in the sky on the other side of Tear.
On the side of Tear where such 'orthodox' beliefs simply cannot be reconciled with reality, anti-Vehiran cultists are more radical - sometimes presenting as violent heretical cults who proclaim Vehira (the deity and the planet) are fabrications created to draw power from Azane in an Infernal conspiracy to enslave the gods and mortals. Typically, espousing such heresies will lead to imprisonment or death.