"Kanzeon" (観世音) is the Japanese name given to the Chinese goddess of mercy and compassion, Guan Yin. According to the teachings of Buddhism, she originated from the Bodhisattva Avalokiteśvara, a male figure, before becoming a deity. Her being is mostly depicted as a beautiful woman wearing a white robe and carrying a jar of pure water and a willow branch. In her meditations, she attempted to aid the ones who needed her, but with only two hands at her possession, she was unable to do it until Amitabha Budha, her spiritual teacher, gave her a thousand arms so that she could complete her task. Guan Yin is so popular in East Asia regions that she received different names. Her origin and history in each region also differs from one another.
While not seen directly, Kanzeon is referenced during the third Vision Quest, in the form of Naomi's special "Kanzeon Redemption" skill, which temporarily boosts her max HP. This is the only spell exclusive to Naomi that Nemissa cannot learn later on in the game. However, this effect can occur via items instead.
Following the event of maxing the Social Link of the Lovers Arcana, Rise Kujikawa comes to realize her true desire to become an idol once again but now with the goal of showing her true self. Himiko then evolves into her Kanzeon, who inherits all status and abilities of Himiko in addition to new ones.