TV-Series
Description
Meisai Tsuruga is the head priestess of the Sanzu Shrine located in the Izumo region and is the wielder of the Deviant Blade Sento Tsurugi. Her past is marked by violence and loss, as she was originally the daughter of a powerful kendo master and a commander of the Izumo Defense Corps. She was orphaned during her preteen years when her father and his disciples were killed in a rebellion. Following this tragedy, she eventually fell in with a group of mountain bandits, where she came into possession of the sword Sento Tsurugi and quickly rose to become their leader.

The name Meisai Tsuruga is not her birth name, which she claims to have long forgotten. Her current identity was taken from the previous priest of the Sanzu Shrine, a man she killed. After learning of the shrine as a haven for young, abused girls, she arrived in a fragile mental state, blaming the priest for not saving her when she was younger. However, as he lay dying, the priest forgave her for her act of violence. This moment of compassion shamed her and led to a profound change. She slaughtered all forty-three of her fellow bandits and took on the priest's name and mission, becoming the new matron of the shrine.

As the head of the Sanzu Shrine, Meisai is polite, utterly devoted to the well-being of her shrine maidens, and carries a great deal of guilt from her past as a bandit. She is very fond of sake, often offering to share a drink with those she meets. The shrine functions as a refuge for women who have suffered severe abuse at the hands of men, to the point where many have killed their abusers. In an attempt to heal their traumatized minds, Meisai has distributed the thousand copies of the Deviant Blade Sento Tsurugi among the girls, using what she calls the sword's "poison" as a form of medicine. Her primary motivation is the protection of these girls, and she believes the swords are necessary for their recovery, even as she is aware that this method is flawed and ultimately binds the girls to the blades.

When Togame and Shichika Yasuri arrive to claim Sento Tsurugi as part of their quest, Meisai is initially willing to negotiate but cannot bring herself to surrender the swords for the sake of her charges. She proposes a duel with Shichika, betting that he cannot defeat her within a battlefield she has prepared. Her role in the story is as the third opponent Shichika must overcome, and their conflict is less about malice and more about two warriors with unyielding principles.

Meisai is a master of the Sentoryu, or Thousand Sword Style, a swordsmanship discipline passed down through her family. This style treats weapons as disposable tools and revolves around instantly disarming an opponent and using their own weapon against them before discarding it. It requires absolute battlefield awareness and the adaptability to use any blade with maximum efficiency. Her possession of Sento Tsurugi, which consists of one original sword and 999 identical copies, synergizes perfectly with this style. Her ultimate technique, Chikeikoka Sento Meguri (Terrain Effect: Thousand Sword Circumference), involves scattering the hidden copies of Tsurugi across a designated area, allowing her to have an endless supply of weapons and complete control over the battlefield. Her final, desperate attack is Kuchu Itto: Okumonjigiri, which concentrates the power of all thousand blades into a single, devastating strike.

The key relationship in her later life is with the shrine maidens, for whom she feels responsible. Her relationship with Shichika is that of a reluctant adversary; she tries to dissuade him from fighting and respects him as a fellow warrior. In the end, she is killed by Shichika in their duel. Before dying, she accepts that the true Sento Tsurugi had chosen her as its master and asks Togame to secure protection from the shogunate for the shrine and the girls, a promise Togame keeps. Her development is one of radical atonement, transforming from a bandit leader into a protective matron, yet she remains a contradictory figure who uses cursed swords to heal, knowing her methods are not a true solution but feeling unable to stop due to her own guilt and the sword's influence.