Brandon

Brandon is played by Ty Fuhrman. This page contains discussion of suicide. 

Season Four
Brandon is a member of Aurora Silver's cult. Throughout season four, he (along with Jonathan and another Unknown Voices) spies on the Underhill through recording devices. After Jonathan loses a recording of The King's voice, Aurora Silver takes Brandon away for a task that is later revealed to be going to the Martin House and killing himself there. He shoots himself in the head after telling Mabel he's going into the ground for her. The bullet goes through his skull and then ricochets off of him, hitting Mabel in the arm. His body is eaten by the House and is later dropped in front of Anna and Mabel before being turned into a rattlesnake.

Season Seven
His death is Jonathan's motivator to betray the cult in Ashes, Ashes.

Eidolon García explains that she tried to save a spirit that was presumably Brandon when she was twelve. He was upset to be taken out of the loop of his death, as he felt his death was the most meaningful thing he'd ever done.

Trivia

 * He's consistently referred to as "young man" or "kid" by the other characters, suggesting he's somewhere around 16-20 (confirmed in a post by Becca De La Rosa). If he was in fact the spirit Eidolon tried to save at a young age, he was only 17.
 * He was very loyal to Aurora Silver's ideology, and wanted to be remembered for his work as a cultist.