Chidori Amagami is the current head priest of the Amagami Shrine and a pivotal figure in the story. He is the grandfather of the three shrine maiden sisters, Yae, Yuna, and Asahi, and serves as their guardian. Chidori is depicted as an elderly man with a kind yet perceptive demeanor. His physical appearance includes white hair that reaches his chest, categorizing him within a senior age bracket.

Chidori's primary motivation stems from a deep-seated concern for the future of his family shrine. To ensure its legacy and survival, he orchestrates a highly unusual arrangement. He extends an invitation to Uryuu Kamihate, a studious orphan who has become disillusioned with faith, to live at the shrine's residence. This offer comes with a non-negotiable condition: Uryuu must eventually marry one of Chidori's three granddaughters and, in doing so, inherit the role of chief priest. This single condition acts as the engine for the entire story, forcing together the skeptical Uryuu and the three sisters who all have their own distinct feelings about their fates.

Chidori's role in the story is that of a wise and strategic patriarch. While his initial announcement shocks both Uryuu and his granddaughters, he does not simply leave them to figure things out on their own. He demonstrates considerable insight, orchestrating this premise not as a simple ultimatum but as a trial designed to help the three sisters and Uryuu grow closer and understand one another. He seems to understand that the process of getting to know each other is as important as the final choice, using the trials and shared challenges of shrine life to help Uryuu prove himself a suitable successor and to help the sisters overcome their individual issues. As the story progresses, he acts as a grounding presence, offering guidance and protection, and is shown clashing with outside figures who pose a threat to the shrine, underscoring his protective nature. His actions reveal a thoughtful individual who cares deeply for his granddaughters' futures and the shrine they represent.

Chidori's key relationships are central to the plot. His bond with his three granddaughters is one of a loving but demanding guardian who pushes them toward a future he believes is best. His relationship with Uryuu is complex; he is both a benefactor who provides the boy with a home and a taskmaster who places an immense burden on his shoulders. Chidori also holds a deeper connection to the past of the shrine and Uryuu's family; he is later revealed to possess knowledge about Uryuu's mother, a secret that ties the protagonist's history more intimately to the shrine than was first known. This revelation cements Chidori's role not just as a plot device but as a keeper of crucial secrets that link the characters' fates.

While direct details of his own development are subtle, Chidori's role evolves from a seemingly eccentric old man imposing a strange contract to a wise mentor whose plans have layers of meaning. His decisions consistently push the other characters toward growth, and his backstory and motivations are gradually revealed to be more nuanced and caring than his initial decree might suggest. He possesses no supernatural abilities himself but wields considerable authority as the chief priest of a significant shrine and demonstrates a sharp strategic mind when dealing with rivals and the complex social dynamics of Kyoto's traditional families.