The main character in the story. An overall nice guy attending middle (and later high) school who gets caught up in many embarrassing but endearing romantic situations. Although his thoughts on girls can get quite perverted on occasion, his gentleness and kindness, as well as his selflessness at times, is what attracts girls to him. His dream is to make films as a director. While not academically gifted, he has great talent with cinematography that gradually develops as the story progresses.
The daughter of a local mayor, she is very concerned about the current state of Noah. When she meets with the children, she decides to leave her hometown. (Source: Wikipedia)
Y�ko is the female lead of the series. She has two main abilities. The first is jaen where she shoots a coiling strand of fire out of her fingertips. There is also dai-jaen which is just a larger, more powerful variation. The second ability is shukichi, an ability which allows her to teleport objects. Strangely enough, although she is generally fearless in the face of evil spirits, she is terrified of normal dogs. During an escape from Hake, she met the child Keita, who was with her for three days and shared his chocolate cake with her, which became one of her favorite things. Due to this incident, she wanted to become Keita's inukami to make a contract with him. Yoko has feelings for Keita and she gets angry whenever he flirts with other girls.
Keita is the male lead of the show. He was considered a failure by his family due to his attitude towards their ancient duty to vanquish evil, treating it like a parttime job, and his initial inability to find an Inukami to bond with. Even though Yôko becomes his inukami and is fully interested in him, he has a bad habit of flirting with other girls; it is later revealed that Keita is mortified by the thought that, if he should develop a relationship with Yôko, he might become the father of a litter of puppies, rather than of a human baby. He is frequently punished for his transgressions by Yôko, to whom he had to promise that he would be loyal to her, that he would be hers and that he would be her toy, to do with whatever she wanted, before she would contract with him. He wears a dog's collar as a symbol of this pact - an item he originally intended as his 'vow gift' to Yôko. Yôko has frequently landed him in jail by teleporting him into a public place without his clothes, causing him to be mistaken for a streaker and arrested for indecent exposure. Due to this, he has been named Ra-ou (Naked King) by the city's perverts (male and female alike). Keita possesses considerable athletic skills, can make frog-shaped talismans up to around the size of his fist from rubber which he can use to make ranged attacks and is a practitioner of xingyiquan. However, a shinigami named 'Sea of Violence' commented his martial arts skill lack style. Despite his many flaws, Keita has considerable redeeming qualities; he is determined, usually fearless and loyal to his friends and to people under his protection.
Kaguya was once the princess of the Lunarians, a race of people living on the Moon. She was exiled to Earth over a thousand years ago for the crime of using the forbidden Hourai Elixir to make herself immortal. Arriving on Earth in what is today central Japan, she was found by a bamboo cutter and dwelt among the humans she had once despised. Though the Lunarians looked upon humans with contempt, Kaguya came to love her new home. Her unearthly beauty led men from all across Japan to seek her hand in marriage, but none could successfully complete her trial of the Five Impossible Requests. After years of exile, emissaries arrived from the Moon; Kaguya had been forgiven of her crime and it had been decided that she should return. Kaguya, however, had grown to love life on Earth and had no desire to return to the lunar capital. Enlisting the help of her friend Eirin, Kaguya escaped from the emissaries and fled to Gensokyo. Taking refuge in an ancient mansion called Eientei hidden deep within a secluded bamboo forest, the two Lunarians began a new exile. During the events of Imperishable Night, Kaguya had been hidden in a secret pathway along with the true moon by Eirin to ensure any Lunarians sent to recover Reisen would not discover her. The heroines, however, did discover her, and challenged her to return the full moon to Gensokyo. After being defeated, Kaguya unleashed her power of eternity in an all-out bid to break the spell of the imperishable night cast by the heroines. Finally she relented and the true moon was recovered. She now spends her days living in Eientei in a carefree manner, sometimes holding exhibitions of Lunarian treasures there for the rest of Gensokyo to admire. Her long isolation has made her lonely, and she enjoys telling stories to any guests she might receive.
Youmu is one of the stranger entities in Gensokyo, part-human and part-ghost at the same time. Her two halves are not intermixed like one would expect from a cross-breed, but actually exist in physically separate bodies. Youmu has a straight-forward and focused personality, which complements her swordsmanship abilities well. However, her personality conflicts with that of her master, Yuyuko Saigyouji, who is very whimsical and playful in nature. Still, she serves Yuyuko as best as she can, tending to the gardens in Hakugyokurou and following her orders. Youmu commonly wields two blades at once, having studied some under her father, Youki. The longer blade, called Roukanken (Tower-Watching Sword) is said to be able to kill ten ghosts in one swipe; the shorter blade, Hakurouken (White Tower Sword), is able to cleave through a person's own confusion. However, not much is known about her particular style of swordsmanship, or her parents. What is known is that Youki, also a servant of Hakugyokurou, had begun training a very young Youmu when he suddenly disappeared one day, leaving her style incomplete. No one currently knows his whereabouts. (Source: Touhou Wikia)