Cerkonos

Cerkonos is the head of the Fire Ashari in Pyrah, and one of the guardians of the portal from the Material Plane to the Elemental Plane of Fire. As an NPC, he is portrayed by Matthew Mercer.

Background
Not much is known about Cerkonos. It is possible that, as head of the Fire Ashari, he has completed an aramente..

Keyleth's Aramente
Cerkonos led Keyleth through the fire trial of her aramente.

Pyrah's Destruction
At some point near the time Thordak escaped from the Elemental Plane of Fire, Cerkonos lost one of his arms.

Sealing the Rift
Cerkonos led the Fire Ashari's efforts to close the rift to the Elemental Plane of Fire, which they did with the help of Vox Machina and Gern Blanston.