Brynhild Ukagaka is a fictional character from the Ukagaka universe, which revolves around interactive desktop mascots known as 'ghosts.' Brynhild is often depicted as a mysterious and stoic guardian-type figure, providing guidance and support to users in a digital environment. Her character is inspired by Norse mythology, specifically the Valkyrie Brynhildr, and she is characterized by her wisdom, sense of duty, and calm demeanor. In the series, she serves as a mentor and protector, helping other ghosts and users alike.