The Master

The Master is an unidentified spirit that is in service to Arylos. His purpose seems to be to seek out souls ready to see Arylos and leave Yoltrund. His power over Kalenor and Navareh seems to show superiority as those Demons back off as soon as he commands them to.

He guides the player through Yoltrund, showing the path to take and offering advice as well as clearing the way as he did with Kalenor and Navareh. His intentions other than bringing souls to Arylos are not clear. It is said in the game that the Master is some form of Cleric, a powerful spirit who willingly serves Arylos, although the conditions for his servitude and who he actually is it entirely unknown.

Trivia

 * A soul in Kurldehv mentions that he is unworthy of "his purification", seeming to hint that The Master was mentioning that he is what purifies souls, however it is stated that the King is actually who purifies souls. Whether the Master is being prideful or not is unknown. One theory is that the Master is some form of incarnation of Arylos.
 * The Master is the only character in Yoltrund that seems to have voice acting to some extent, with the sound effects of when he appears and fades. The only other characters are the Soulless One upon death, Kalenor, and Navareh.
 * Kalenor has a background sound effect the same as the Master. The background effect sounds like a bass heavy voice speaking in some form of language. The reason for the reused effect is unknown.
 * The Master has an audio file for appearing and fading. The awake effect sounds like a strained voice speaking in tongues while the second one speaks clearly saying something to the effect of "zarudei". The meaning of the phrase and difference in audio is unknown.
 * The Master in the story constantly stays by the Soulless One while in the game, he only appears in rare circumstances. The developer notes that this is due to not giving the player a companion to worry about and not "holding their hand" through the game.