While the provided materials do not reference a character named "Murasaki Higyaku," they include a figure known as Murasaki—alternately identified as "Yatsu Murasaki" or "Murasaki Yatsu"—within "The Dark Knight Ingrid" storyline. This Murasaki is depicted as a captured Taimanin who shares captivity with Ingrid. No details exist for a character specifically designated "Murasaki Higyaku" in the series or related media.