Kigetsu is a character from the anime Sword Gai: The Animation, serving as the chief priest of the Hagakure Shrine, a secluded religious site nestled deep within the Hida mountains. His background and past remain shrouded in mystery, contributing to his enigmatic presence within the story. Physically, he is depicted as a bald man with gray eyes, though further details about his age or other attributes are not explicitly provided.

Kigetsu is a figure of fascinating contradictions, blending the solemn responsibilities of his sacred role with a dark and unconventional personality. He is known for his lighthearted, eccentric, and often playful demeanor, which can make him seem unserious or mischievous. This jovial exterior, however, masks a perceptive and shrewd individual who possesses a deep, almost ominous fascination for violent conflict and bloody combat. He openly expresses enjoyment at the prospect of brutal fights and does not shy away from showing a sadistic side, such as when he mocks the character Soin following his defeat at the hands of an Armed Demon. This behavior starkly contrasts with the expected decorum of a shrine priest, highlighting his unpredictable nature. Despite his dark interests, he does not abandon his sense of duty as a priest, creating a constant tension between his position and his personal inclinations.

His primary role in the story is that of a mysterious observer and informant, operating from the isolated Hagakure Shrine. He possesses an extensive and troubling knowledge of the supernatural forces at play in the world, most notably the Armed Demons. Furthermore, he is well-versed in the secret organizations that oppose these demons, specifically the Chronologs and the Wabishu. This insider knowledge suggests a much deeper involvement in the hidden supernatural struggle than he ever openly admits, leaving his true purpose and affiliations ambiguous. He seems to operate on the fringes of the main conflict, watching the wars between these powerful groups without taking a clear side, which adds to his air of double-dealing and secrecy.

In terms of key relationships, Kigetsu is noted for his tendency to tease and provoke other characters. His interaction with Soin, where he mocks the other man's defeat, reveals a cruel streak and a lack of compassion for the suffering of others. The mystery surrounding his character means that most people around him are left puzzled by his true motives, uncertain of where his loyalties truly lie. There is little to no information about his development or any significant change he undergoes throughout the series.

Kigetsu's most notable ability is his profound and unsettling knowledge of the world's supernatural elements, including the Armed Demons and the groups that fight them. He has a signature verbal tic or catchphrase, often shouting Katsu a word that can be interpreted as Wake up or Cut it out which adds a unique and assertive flair to his speech. His ultimate motivations remain unclear, but his actions consistently paint the picture of a man who, while fulfilling his role as a priest, finds genuine excitement in the chaos and violence of the conflict around him. He dances on the line between a helpful informant and a dangerous instigator, ensuring his true intentions remain a guarded secret.