Arne Neuntöte is the main protagonist of *Arne no Jikenbo*, a legendary vampire detective who solves cases in a town of non-humans while demanding blood instead of money as payment.
Once known as the “most terrifying” vampire created from nine royal hearts, he now works as a playful but dangerous private detective who changes between a boy and an adult form.
Arne Neuntöte is a vampire detective living in the town of non-humans called Ryugenberg.
He operates a private detective agency there and treats every case as a kind of entertainment.
He believes that mysteries are meant to be enjoyed and approaches investigations with an almost theatrical flair.
Under the red moon, he invites others to “dance merrily together,” turning even grim incidents into a kind of macabre game.
Although he was once an overwhelmingly powerful legendary vampire, he has lost several of his hearts and is no longer at his full strength.
Because of this, he switches between a youthful boy form and a mature adult form depending on the situation and his physical condition.
The heroine Lynn Reinweiß calls him “Arne-sama,” showing both respect and a bit of awe toward his power and charisma.
Despite his whimsical attitude, Arne possesses sharp intelligence and vast experience, allowing him to unravel complex incidents with ease.
His detective work is not motivated by money; instead, he demands the living blood of his clients as compensation.
This reinforces his identity as a vampire who never really tries to be “human,” even while playing the role of a quirky detective.
Name: Arne Neuntöte
Species: Vampire
Gender: Male
Occupation: Detective (Private Investigator)
Likes: Blood, hot chocolate
Dislikes: Lemon
Personal Belief: “Mysteries are meant to be enjoyed.”
Voice Actor (Adult, Anime): Koki Uchiyama
Voice Actor (Boy, Anime): Aimi Tanaka
Arne resides in Ryugenberg, a town inhabited by various non-human beings.
There, he accepts requests from unusual clients and dives into bizarre, supernatural cases.
He uses his high intelligence, supernatural abilities, and long years of experience to solve incidents.
Even when he acts laid-back or bored, his mind is constantly observing, deducing, and manipulating events behind the scenes.
In the distant past, nine vampire kings each offered their hearts to create Arne.
As a result, he was born as a legendary, “most terrifying” vampire possessing nine hearts.
At present, however, some of those hearts are missing, leaving him weaker than his original form.
This loss of hearts is deeply tied to his current condition, his transformations, and his ongoing interest in recovering what he has lost.
Throughout *Arne no Jikenbo* and its related episodes, Arne is introduced with playful “status” captions.
These captions highlight his mood, number of hearts, and his attitude during each case.
Case 1
Caption: “Former ‘most terrifying’ vampire private detective.”
Attitude: ★★★★★
Height: ★
Ability: ★★★★★
In Case 1, he is presented as a once-legendary vampire whose power has decreased compared to his prime.
His “height” score hints at his smaller form, while his “ability” and “attitude” show he is still overwhelmingly capable and confident.
Interlude
Caption: “Vampire detective with two hearts.”
Attitude: ★★★★★
Motivation: ★★
Hearts: ★★
During the Interlude, Arne is described as currently having two hearts.
He retains his bold attitude but shows relatively low motivation, suggesting he only gets truly fired up by especially amusing cases.
Case 2 (Question Part, Teil 5)
Caption: “Detective who only accepts delightful requests.”
Hearts: ★★
Attitude: ★★★★★
Deduction: ★★★★★
Here, Arne’s picky side shines through: he prefers “fun” or “interesting” requests.
His heart count is still low, but his deduction skill and attitude remain top-tier.
Case 2 (Question Part, Teil 6)
Caption: “Vampire detective seeking hearts.”
Hearts: ★
Composure: ★★★★★
Ability: ★★★★★
In this stage, Arne is actively searching for hearts, implying he has only one at the moment.
Despite this precarious condition, his composure and abilities are shown as impeccable, emphasizing his frightening calm and competence.
Case 2 (Solution Part, Teil 7)
Caption: “Everything rests in the palm of his hand.”
Hearts: ★★
Schemes: ★★★★★
Thinking Power: ★★★★★
By the solution phase, it is suggested that Arne has regained an additional heart.
The focus on “schemes” and “thinking power” reveals that he had been orchestrating events and deductions from the outset.
Snow Woman’s Love Consultation
Caption: “Slightly gloomy vampire detective.”
Hearts: ★★
Motivation: ★
Worries: ★
In this scenario, Arne is portrayed as a bit melancholic, possibly due to the nature of the love-related consultation.
His low motivation and low “worries” rating give a comedic touch, as if he finds romance more troublesome than dramatic murders.
Werewolf and the Jewel
Caption: “Vampire detective killing time.”
Hearts: ★★
Free Time: ★★★
Motivation: ★
Here, Arne is mainly bored and looking for something entertaining to do.
His “free time” is high, suggesting the case is partly a way for him to stave off ennui rather than a serious challenge.
Radio Hittsujii
Caption: “Vampire detective killing time.”
Hearts: ★★
Free Time: ★★★
Motivation: ★
In this radio-related episode, his “killing time” mood continues.
He has enough leisure to participate in more casual, talk-oriented content.
Big Cleaning Operation
Caption: “Vampire detective who slept the whole time this time.”
Hearts: ★★
Free Time: ★★★
Sleepiness: ★
During this episode, Arne is said to have spent the event mostly sleeping.
His role is more of a background presence, emphasizing his laid-back, often lazy side between major incidents.
General Alternate Names
Arne is sometimes referred to simply as “Arne-sama” or “Arne” in various contexts.
These nicknames reflect the respect, fear, or fondness other characters feel towards him.
“Arne-chan”
“Arne-chan” is a nickname used for his small, childlike form.
This form appears when Arne has not replenished his blood, making him look like he has regressed to a much younger age.
When Lynn Reinweiß first saw this tiny version of Arne, she called him “Arne-chan.”
The name stuck as a cute, slightly teasing way to refer to his weakened, adorable appearance.
In contrast to his imposing adult form, the “Arne-chan” form visually reflects his current number of hearts and blood supply.
Despite the innocent look, he remains the same cunning detective inside, complete with sharp insight and a taste for mysteries.
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