Argemia Armuntela is a character that EternityDev created at some point in the past. Nothing about him is currently known.
"Argemia Armuntela" was used as ED's username in multiple social media accounts, including VK, Facebook and Вконтакте24. This led many people to believe that this was his real name, however later he revealed that his name is Максим and that Argemia was a character he created. He has not mentioned anything more about the character since.