Amon is the Shadow Akiren

He is the transformed manifestation of Hatred and Anger, therefore his akibon surrounds itself around those who's motivated with anger and hatred. Notably Jir and Crain.

Roughly a thousand years prior to Rusted Sorrows canonical timeline, Tirimishi's power was stolen by three founding Hamsarians: Wivu, Kinessa, and Gira. Since then, he has been extremely weakened, and taken up multiple Akiren Personas, one of them being Ornaid. The multiple persona's were to fool different regions of Taeleera into worshipping him, and Nostu to bring their soul essence into Amon.