Murasaki Yatsu is a demon hunter from Goshi Academy and a formidable kunoichi, second only to Asagi Igawa in skill. Known for her strict and stern demeanor, she often comes across as cold and distant. In truth, however, Murasaki is deeply kind and fiercely loyal, willing to risk everything for the sake of her friends.

She is Asagi's childhood friend and longtime colleague, having trained alongside her from an early age. Over time, Murasaki grew increasingly awed by Asagi's talent, which gradually developed into affection. This unspoken admiration complicates their relationship—whenever Asagi is nearby, Murasaki becomes visibly nervous and prone to blushing.

Murasaki's body possesses extraordinary regenerative abilities and immense physical strength. These traits allow her to survive near-fatal injuries and wield a massive axe with ease, cutting down multiple demons in a single swing. Her relentless combat style and overwhelming power have earned her a fearsome reputation, making her one of the most dangerous opponents a demon can face.

Thanks to her regeneration, Murasaki is effectively immortal. The only way to kill her is to destroy both her brain and heart simultaneously.