Rurisen is a fictional character from the anime series 'Reikenzan: Hoshikuzu-tachi no Utage'. He is a master cultivator and holds the position of the head instructor at the Reiken clan, one of the most prestigious and powerful sects in the series. Known for his wisdom and calm demeanor, Rurisen plays a significant role in guiding young cultivators through their training and challenges. His expertise and mentorship are crucial to the development of the protagonist and other key characters, making him an indispensable figure in the storyline.