The Uncle (Akuma no Riddle)

"Little Mahiru! You sure the perfect bride for me!"

- Mahiru's Uncle about to rape Banba

Mahiru's Uncle or just known as the Uncle, is a minor character but significant character to Mahiru "Shinya" Banba's arc in Akuma no Riddle manga and anime series. He is introduced as a flashback yet a posthumorous villain who caused permanent trauma in both Mahiru and Shinya. He also ndirectly affected Sumireko Hanabusa's life after Class Black was disbanded.

Due to the nature of the series, his appearances were censored in anime series and had no voice actor.

in Akuma no riddle
The uncle was an abusive pedophile who loved abusing and torturing young girl from 1-years old to 12-years old to the point of sexually abusing other children from his neighborhood. Once finished with his acts, he would torture them to a near-state of death for resisting his "love". Noticing children were easy targets to sastify his sexual desires, he started to lure older girls to the shred and rapes them while claiming they are more "tight".

At one point, he started to sell photos of naked girls to the Internet for a high price for users of Deep Web. To increase his profit, he started to record videos of child pornography in Porno websites. Like always, he blackmailed children in killing them if they exposed his crimes. At one point, when Mahiru was born, he found her very attractive because of her silver-long hair. Noticing someone like her would fit perfectly to be his wife, he kidnapped Mahiru from her family when she was 5-years old and did everything to hide his crime from the police and family.

Under his possession, Mahiru was beaten, tortured and raped by him for weeks in the basement of his house. To profit even more, he started to cosplay her in sexual fantasies and took thousands of photos from her naked body which he claimed to be "pure". Everytime Mahiru refused to be part of the sexual section of photos, he forced her to eat drugs to calm her nerves and continued to rape her while taking photos of their act together.

One day, during his sexual section of photos, Mahiru said she was hungry but he replied he was only going to give her food if she give him a blowjob (censored scene). When he was finished, he locked up inside of the dark room again as she cried to leave since she was afraid of the darkness. Due to his abuses, Mahiru lost a part of her mind and gained two personalities inside of the same body, this new personality would later be known as Shinya Banba. Noticing Mahiru's suffering, Shinya planned to kill her uncle in order to protect her, she then proceeds to use the knife of her dinner to kill him the next time he enters in the room. Opening the door, he is welcomed with Shinya stabbing him in his stomach and slowly had her way to rip his guts off. However, before his death, he still managed to strangle her and used her knife to kill her, yet he failed and could only give her a scar in left eye.

Despite being a one-time character, her uncle left a lasting effect on her mind. Eventually, Mahiru and Shinya caught a phobia of camera flashes and his abuses turned her into a psychopath who would later need to commit murders to survive in the world, thus turning Shinya and Mahiru in a professional assassin.