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Villain Overview
Are you awake? Relax, I won't kill you right away, I still have plenty of time before I reach my time limit, I'm going to enjoy this slowly. Hey, did you know? Spiders insert their venomous fangs into the prey they catch and suck out their bodily juices by dissolving them from the inside. The prey remains alive as it's killed little by little, can you imagine it?! Kuku....It gives me the chills! I don't have poisonous fang or anything like that, so I use these! I cut my prey little by little! What wonderful scars. I will overwrite all of you. [...] Ahh...Wow, can not stand it. I'm getting all wet!
~ Otoya Takechi's most famous quote.
I hate every child and woman in this world. I want to kill every child who smiles; they do not deserve to be happy like me. I have blood on my hands, and my soul is dead....
~ Otoya Takechi

Otoya Takechi is the main antagonist of episode three of the anime series Akuma no Riddle, and later in the tenth episode as the secondary antagonist. She is a serial killer who terrorized an entire town in fear. She considered one of the vilest among the assassins of Black Class by the fact that even after having a chance to go to the side of good to become Haru's friend, she refused and continued her hunt to kill her for pure sexual pleasure.

She was voiced by Manami Numakura in the Japanese dubbed version, and Colleen Clinkenbeard in the English dubbed version, the latter who also voiced Angela Blanc.


Early life

No one knows anything about the Otoya's past and how she became a Assassin, until some point in her life she earned the title of "Jack the Ripper of the 21st century", after she killed 29 people, cutting and brutally mutilating them with the use of scissors. There is no database about her life or her family, however, there are theories that have emerged within the universe of the anime that she killed her own family. Part of her reason for joining the Black Class was to hide from a detective that has been trying to catch her.

The Notification


Otoya creating an death notification.

Otoya was the first assassin to attempt to kill Haru Ichinose after sending a notification on a black envelope to her saying "I'll kill you", but because there was no name on it, she uses it to secure it in Shiena.

Assassination Attempt


Otoya after poisoning Haru.

Later, Otoya and Haru are sitting on a bench, talking. Otoya gives Haru a bouquet of flowers and says she is protecting her from Shiena. Suddenly, Otoya tells Haru it was actually a lie and pushes the bouquet into Haru's face, causing Haru to faint since the flowers were Gelsemiums. Otoya tells the knocked out Haru that she'll make sure she is "safe". To make sure Tokaku doesn't intervene, she locks her in the dormitory basement after telling her that Haru and Shiena were in there, but Tokaku manages to escape through ventilation pipes.

Later Otoya is shown to have taken Haru to the botanical gardens where the class had gone on the previous day. She then strips Haru down to her underwear and slowly began to torture her, gaining a type of pleasure. Tokaku then calls Otoya's cell phone and then questions her location but wasn't given an answer. Haru, then tries to escape and then tried to hide, but she only made Otoya angry. Tokaku hears the bullfinch through her phone while trying to talk to Haru who is being tortured by Takechi and figures out where she is because Mizorogi taught them about bullfinches, mentioning that its chirp sounds like a whistle so she immediately rushed to Haru and Otoya's location.

Akuma 03-2

Otaya excited torturing Haru.

Otoya then finds the location where Haru tried to hide herself and was about to deliver the final blow with a pair of giant scissors, only to be  grazed by bullets that were fired from Tokaku; Otoya quickly rushes up to Tokaku, blocking a few more shots from her gun and simply overpowered her. Tokaku was pinned down onto the ground and Otoya is about to use the giant scissors to stab Tokaku's eyes.

Otoya fights against Azuma.

However when she was about to land the finishing blow on Tokaku, she was ambushed from behind and poisoned by Haru Ichinose using the same bouquet of flowers which made her collapse, falling unconscious. She then laid there for the remaining time and when morning came, Nio informs her that she must drop out of the school because the time limit is up, making her the first student to be expelled from the Black Class.

The Return


Otoya escaping from prison.

Later in the series, Otoya comes back to the academy so that she can kill Haru but was caught and held against her will by Sumireko Hanabusa. During the assassination attempt on Haru by Sumireko, she got involved and changed her mind about killing Haru and instead wanted to kill Sumireko, but she was no match and was easily knocked out. When she woke up, she was confronted by Nio Hashiri. In the final episode, she is back in prison and waiting until she's released.


Otoya is a typical girl who socializes with other people and make friends easily. She often speaks mostly with Haru, always trying to socialize her with the target to win the trust of her prey.

However, like most characters in Akuma in Riddle, this is usually her main character on the surface and a false mask that covers the real monster behind the smile. Whenever she are about to kill someone, she will instantly switch to a very shady character, sadistic and even intimidating. When she begins to torture and mutilate the victim of her slowly, she gets so excited enough to talk she is "wet". She can detect lies with ease and can easily manipulate the people according to her wish. She is one of the most ruthless characters and tactical series, once going so far as to try to involve other innocent people in her murders.

She often compared to Mahiru "Shinya" Banba as the most mentally unstable series, however, Mahiru about personality disorder and has two personalities in the morning, the shy personality takes control of the body and at night, the psychotic personality takes control of the body.

Otoya is a sadist who hides her true nature under the guise of an playful girl. She likes to tease others, but her actions are seen as borderline bullying. In addition, she is quite obsessed with her scissors to the point where she carries a whole bag of them around on her waist, which she uses to carry out serial killings. And according to Suzu Shutou in the anime, Otoya kills for a kind of sexual pleasure.

Skills and Abilities

Her skills and abilities using her preferred weaponry are exceptional as seen when she wields a small pair of scissors or both sides of a larger one with ease as though they were a blade or sword, which was enough to defeat Tokaku Azuma who wielded a gun at the time for a brief moment.

She also seems to have some knowledge of poisonous flowers and spiders, as she was able to recognize and use the poisonous Gelsemium elegans flowers to incapacitate Haru, and compares her killing style to that of a spider.


  • According to Otoya, both her and Haru Ichinose's birthdays are a day apart which would make her birthday fall on the 2nd of January or December 31 (in the manga, she claims that it falls on December 31). However, she was actually born on March 10.
  • Otoya is based on the real Jack the Ripper, but she is actually based on several studies conducted by researchers of the 21st century who suspected that the killer was a woman who hated prostitutes and mutilated them with scissors, tearing their uteri. Also for researchers who still seek the true identity of the killer since 1888.
  • Otoya is referred to as "The Yangire Princess" on the Internet.
  • Among all the other antagonists at Akuma no Riddle, Otoya is the only antagonist who killed for simple reasons without justification while other characters in the story killed people for causes or tragic events in their lives.
  • Unlike other villains who have returned to their normal lives and redeemed themselves, Otoya was the only one out of all of the characters in the series to receive punishment.
  • In the manga, Otoya did not make a reappearance during Sumireko Hanabusa's attempt to kill Haru.
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