What is a fiend in chainsaw man?

In the manga series "Chainsaw Man" created by Tatsuki Fujimoto, fiends are demonic creatures that possess extraordinary abilities and serve as antagonists in the story. One notable fiend in the series is Aki Hayakawa, a devil hunter who becomes a fiend after being fatally wounded in battle.

As a fiend, Aki gains immense strength, agility, and regenerative abilities, making him a formidable opponent. However, he struggles with his newfound monstrous nature and the loss of his humanity. He is often shown wearing chains around his body to symbolize his inner turmoil and to suppress his fiendish urges.

Despite his transformation, Aki retains some of his sense of morality and his desire to protect others. This conflict between his human emotions and his fiendish instincts adds a layer of complexity to his character and makes him a compelling figure in the series.

Overall, Aki is a multifaceted and tragic character who undergoes a profound transformation as he grapples with his inner demons and struggles to find his place in the violent and chaotic world of "Chainsaw Man."