Mattie is a non-binary demon VTuber who primarily makes content in English, but also speaks Japanese and French. He primarily creates gaming content, with a focus on PC, horror, and Nintendo games. His streams are generally very relaxed and laid-back. Mattie's content is not suitable for viewers under the age of 18, as he often makes sexual jokes and plays games that contain graphic or disturbing content.
Bored with day-to-day life in the underworld and all the bureaucracy involved in being a demon lord, they handed off most duties to their underlings, then decided to come to the human realm to seek amusement from humanity's quaint cultures. Though immortal, and generally stuck in their human-friendly form, they've been living what most would consider a "normal" life while learning about human culture in order to better understand them and blend in. They have grown attached to most sentient Earth creatures, especially humans, and live vicariously through their happiness and fulfilment of their desires. However rarely it may be, when exceptionally angered or endangered, Mattie may take on a much more sinister, demonic form. In addition to this, they are capable of using shape-shifting magic, though it does tire them out once they stop casting it.