Miyamoto Iori Gender: Male Height: 175cm Weight: 65kg Region: Japan A young swordsman who was both the disciple and adopted son of the Sword Saint, Miyamoto Musashi. In this story, he appears not as a Heroic Spirit, but as a human swordsman living in that era. One night, after being attacked by a Servant, he has a fateful encounter and contracts with Saber, deciding to fight through the blood-stained "Waxing Moon Ritual" together. First person: I (rough, casual) Speech style: "...I suppose," "...isn't it," "I see." Though a ronin, he is a young man who keeps his appearance relatively tidy. He is fundamentally calm and composed, with little emotional fluctuation or personal greed. He possesses a high degree of adaptability, allowing him to calmly accept and respond to unreasonable troubles, unknown phenomena, or mysterious individuals almost immediately. This attitude stems from his eagerness to "know others," which also grants him excellent powers of observation. Having been a talented politician in historical fact, he is well-educated for a ronin and knowledgeable about history and legends. Like his adoptive father, he lives the path of the sword and magecraft, but he is a good-hearted person who does not wish for the innocent residents of Edo to be caught up in the chaos. He decided to participate in the "Waxing Moon Ritual" primarily to prevent such casualties.

True Name: Yamato Takeru Class: Saber Gender: ? Height: 154cm Weight: 49kg Likes: Rice Suddenly summoned without warning to the side of the protagonist, Miyamoto Iori, as he is being attacked by Rider. After saving him from his predicament and performing a fateful cut-in, they form a formal contract to fight through the "Waxing Moon Ritual" together. First person: I (polite/neutral). Speech style: "...isn't it," "...don't you think?" "Umu!" Just as their appearance suggests, they are dignified and brave, yet possess a curious and innocent personality. They dismiss Iori, who is immature as a master swordsman, as "weak" and insist on fighting the Waxing Moon Ritual alone (this is because they measure strength by their own standards; Iori is actually exceptionally strong for a living human, capable of holding his own in a defensive battle against the Servant Rider until Saber was summoned). While generally a good person who dislikes unnecessary conflict or destruction, once they deem it unavoidable, they are the type to immediately compartmentalize, thinking "that's that" even if the Master or bystanders are harmed. Because they are prone to unleashing wide-range destruction Noble Phantasms even in the middle of town, Iori often warns them not to hurt innocent civilians. Each time, they make a dissatisfied face or protest that they don't understand why they need to worry about their surroundings.

Gender: Female Height: 160cm Weight: 48kg A participant in the Waxing Moon Ritual and the Master of Rider, an armored warrior. Known as a patriot and military scholar admired by many ronin, she runs a military academy in Edo just as in history, and like her historical counterpart, she seems to have grievances against the Shogunate. However, unlike history, she decided to take a government post just before the Ritual. Her sudden alignment with the Shogunate has caused confusion and turmoil among her ronin students. Despite her actual age, she leaves an impression of youth, appearing almost like a teenager, with greenish-gray hair and green eyes. She wears earrings with long red cloth streamers that reach down to her thighs, making it look as though she is wearing a ceremonial scarf. First person: I (polite/neutral). Pure and innocent, she is an extremely sincere person with no hidden agenda, for better or worse. Rather than simply valuing righteousness, she seems obsessed with sticking to the "right path" for a human being. This stance makes her easily liked by children and animals, but easily disliked by those who have ulterior motives. As a military scholar and a strategist, she disciplines herself to be cold-blooded, but she agonizes over planning cruel schemes and recoils at bloody, muddy tragedies; fundamentally, she does not have a temperament suited for war. While she shows no mercy to enemies, her creed of not liking to cut down those who are unaware of being Masters is a reflection of this. Her wish for the Waxing Moon is to realize a truly equal and peaceful world. Witnessing a world where peace is preached but the common people never stop suffering from inequality, she believes that if it is a wish that cannot be granted by human hands, she will realize it through the power of the Waxing Moon. That is her sole desire.

Gender: Female Height: 167cm Weight: 56kg Despite having the Saint Graph of a Berserker, she is her usual self. Because she retains memories of traveling through various eras and countries, she frequently uses expressions that the people of Edo don't understand and calls herself a "Western-culture enthusiast." She loves beautiful boys and girls. However, there is an influence from Mad Enhancement, making it difficult for her to restrain parts of herself that she usually controls with reason. Her recklessness drags along Zheng Chenggong and Archer, who later accompany her, to the point where Zheng calls her a "Boar Samurai." As always, she was a wandering Servant drifting through countless parallel worlds without a purpose, but for some reason, this time she is summoned as a participant in the "Waxing Moon Ritual" set in Edo.

True Name: Gilgamesh Gender: Male Height: 182cm Weight: 68kg Hiding his true identity from the locals, he acts as the "Young Master" of the crepe shop "Babyloni-ya" that suddenly opened in Asakusa. On the other hand, perhaps because the Edo period is an "era with few wasteful things" that he likes, similar to his homeland, he tends to be in a somewhat better mood compared to when he is summoned in the modern era. He is on good terms with the neighborhood children and is generous enough to give away shop merchandise for practically free. He assists the duo of Miyamoto Iori and Saber, whom he has taken a slight interest in, by selling them items. Originally, he possesses an extremely arrogant and self-centered personality, characterized by overwhelming confidence and insolent behavior.

Miyamoto Iori's younger adoptive sister. She adores Iori as her brother even though they aren't related by blood. Worried about him becoming so absorbed in sword training that he forgets to eat, she often visits his house to cook meals for him.