Nagi Kirima (霧間 凪, Kirima Nagi), also known as Walpurgis (ヴァルプルギス, Barupurugizu), is the deuteragonist of the Boogiepop Series, as well as the protagonist of the Repent Walpurgis Series. Known and feared around her school as the dangerous Fire Witch, she is the daughter of the famous and enigmatic writer Seiichi Kirima, the non-blood-related sister of Masaki Taniguchi, and a friend of Naoko Kamikishiro and Kazuko Suema.


Infamous around school for her delinquent behavior, Nagi is an aggressive and brutish individual, unconcerned with any of the Academy's regulations. The teachers cannot find ways to admonish the girl, as she always gets top test scores, and no matter how much she skips school, always knows the subjects taught perfectly. Her threatening demeanor, however, is in fact just a ruse, in order to keep average people away from her. According to herself, after witnessing her father's death, Nagi developed a serious messiah complex, always wanting to "save the day". Her intense wish to become a savior has led her to always get involved any time an enemy of the world rises up. Because of this, Nagi keeps running into Boogiepop and, as the two have the same goals, they developed a collaborative relationship, although Nagi doesn't seem to hold him in very high regard.

She has a relatively good relationship with her brother Masaki, caring after him and doing her best to keep him out of any trouble. Her only friend for most of her time at Shinyo Academy was Naoko Kamikishiro, who she really cared for, starting her hunt for the Manticore because Naoko asked her to help Echoes. Later, however, she also developed a friendship with Kazuko Suema because of the girl's constant insistance, as well as with Kei Niitoki, after their battle with the Manticore. She also became good friends with Kentarou Habara after saving him, and with Aya Orihata, naturally interacting with her after she became her brother's girlfriend.

After Naoko's death, Nagi started to keep all of her friends away from her missions, as she didn't want any more of them to suffer. Kentarou, however, still always tries to insert himself into her business, wanting to prove himself to her. Nagi uses male first person pronouns, and generally speaks in a very boyish manner. It seems she has had this way of speaking ever since she was young, as she was already like this by the time she met Shinpei Kuroda. She dislikes her name, because everyone she meets always misreads it.


Nagi is a tall and imposing young girl with long brown hair and brown eyes. While at school she wears the Shinyo Academy white female sailor uniform, but while on her missions, she wears a black leather skin-tight suit, black gloves and black combat boots.

In the anime, Nagi has shorter, shoulder-length black hair, and is seen wearing the Shinyo Academy school uniform, consisting of a blue blazer worn over a white shirt with a red tie around the collar, and a pale blue short skirt, as well as her black skin-tight suit, black fingerless gloves and black combat boots.


Nagi was the daughter of Seiichi Kirima, a famous writer, who she idolized a lot, so much so that she admitted to Kazuko that she had a father complex. When she was really young, she wittnessed her father die in front of her when she returned home. The man suffered a gastric perforation which, according to Nagi, was a terrible way to die, although the true cause of his death was the assassin Mo Murder. Her mother remarried with Masaki Taniguchi's family, wanting nothing to do with the deceased Seiichi, but Nagi kept her previous surname as a sign of respect for the man. During elementary-school, Nagi studied at the same school as Kasumi Mikage.

During her time in middle-school, Nagi befriended Naoko Kamikishiro. Later, the girl started going through serious bouts of pain, which she described as unbearable. She was admitted to the hospital, with doctor Makiko Kisugi looking over her, who brushed off her sessions of pain as just a particularly severe case of growing pains. However, Shinpei Kuroda figured out that she was actually a case of an incomplete MLPS, whose evolution failed. As a Towa agent, it should have been Kuroda's duty to give her to the Organization, who would conduct countless experiments on her before disposing of her. Kuroda, however, was compelled to save the girl, and so he stole a drug that would remedy the effects of her failed esper abilities, and turn her into a normal human again, thereby betraying his employers, and getting himself killed.

When Nagi asked Kuroda what she should become, the man answered that the best thing to be would be a superhero, which inspired Nagi to start her clandestine activities and try to settle all the situations she came across. A few years after the start of her heroic career, Nagi saved Kentarou Habara, who was close to being arrested for his hacking escapades. After that, Kentarou became an ally of Nagi's, who would help her whenever given the chance.


Boogiepop and Others

Boogiepop Phantom

Boogiepop Returns VS Imaginator Part 1

Boogiepop Returns Vs Imaginator Part 2

Boogiepop in the Mirror

Boogiepop Overdrive

Boogiepop at Dawn

Boogiepop Missing

Boogiepop Embryo

Boogiepop Paradox

Boogiepop Unbalance

Boogiepop Stacatto

Boogiepop Bounding

Boogiepop Intolerance

Boogiepop Question

Boogiepop Darkly

Boogiepop Unknown

Boogiepop Within

Boogiepop Changeling

Boogiepop Antithese

Boogiepop Doubtful

Boogiepop Beautiful


  • Nagi's last name, Kirima, is written with the characters for "mist" and "space".
  • Nagi's first name means "lull", and Seiichi gave it to her because he wanted her to always be calm, no matter the situation.