Kazuko Suema (末間 和子, Suema Kazuko) is the tritagonist of the Boogiepop Series. She is a student of Shinyo Academy with a secret interest in criminal psychology, and a friend of Touka Miyashita and Nagi Kirima.

It is later revealed that Kazuko is an MPLS possessing the ability Moon River (ムーン・リヴァー, Mūn Ribā). After meeting Oxygen, she becomes the new Axis of the Towa Organization.


To her classmates, Kazuko appears as a normal girl with an abundant amount of knowledge about very obscure subjects. However, in reality, Kazuko has a secret obsession with criminal psychology, born from the time she was almost chosen as the next victim in the serial killer incident. Ever since then, she has studied the mind of these kinds of individuals. As a result, she has naturally come into contact with Seiichi Kirima's books, who became Kazuko's favorite writer, despite her having never read any of his stories, only reading his non-fiction works. Kazuko keeps this hobby of hers a secret from her classmates because she knows that she would be ostracized for having such a "weird" hobby.

Kazuko has an admiration for Nagi after learning of her occupation, as she doesn't want to believe that someone can die or get hurt purely because of the whims of some evil individual, like the serial killer who planned to attack her years ago. And so, once she found out about Nagi's messiah complex, she found it inspiring that there is someone who can help victims like she almost was. Unlike the other girls in her school, Kazuko doesn't believe in the rumors about Boogiepop at first, being the type of person that only truly believes in things she can see with her own eyes.

Despite having such grim hobbies, Kazuko is a nice person at heart, proven by when she encouraged Aya Orihata to keep living when she mistook her for trying to jump off the roof of the school. Even though she didn't believe her own advice to be anything special, her kindness actually encouraged Aya to survive. Kazuko is also a good friend of Touka, who she often helps with studying for exams, as her grades are far superior to her friend's. Kazuko has shown to put a lot of trust in Touka, even confiding in her with her secret hobby, something she usually keeps hidden from anyone else. Because of the abundant amount of time the two spend together, Kazuko has met Boogiepop several times, and although she never recognizes him, she can tell that there is something different about Touka at these times.


Kazuko is a young girl with long black hair tied in braids, and brown eyes, over which she wears glasses. She is mostly seen wearing the Shinyo Academy white female sailor uniform, and a dark blue short skirt.

In the anime, Kazuko has long, straight black hair, and wears the Shinyo Academy female school uniform, consisting of a white shirt with a red tie around the collar, over which she wears a blue blazer, a pale white short skirt, and knee-high white socks.


Kazuko had her first encounter with the abnormal when she was the last target of the vicious serial killer Fear Ghoul, who killed many girls in Kazuko's town, framing the Towa Organization assassin Mo Murder. It was the killer's plan to target Kazuko next, but she was saved when the police almost caught the criminal, and so he hanged himself before they could capture him. In actuality though, the real savior of Kazuko was Boogiepop, who first awakened during this time, and defeated the Mo Murder, who, unbeknownst to Kazuko, was an agent of the Towa Organization.


  • Moon River (ムーン・リヴァー, Mūn Ribā): Kazuko's MPLS ability. Details are unknown. It is described as an unreasonable ability, theorized to be capable of 'invalidating reality'.


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


  • Kazuko's first name means "child of a person of high social standing".
  • Kazuko's last name, Suema, is written with the characters for "end" and "space".
  • The name of Kazuko's ability, Moon River, is a reference to the 1961 song of the same name by Henry Mancini and Johnny Mercer, famously performed by Audrey Hepburn in the film Breakfast at Tiffany's.