Akira Fudo: He is passive and cowardly, but very good natured, thanks to the efforts of Ryo Asuka he is possessed by the demon hero Amon. But due to Akira's pure heart he gains the demon's powers, memories, bravery, strength, and willingness to fight while maintaining his human consciousness and he is a heroic demonman

Ryo Asuka: He is kindhearted and has an affinity for nature as shown in Neo Devilman. Throughout the events of the original manga, he is very serious and behaves somewhat erratically, likely due to stress and trauma of the situation, but Akira remarks that this is not his normal demeanor. and he is actually a intersex angel, with both male and female genitalia

Miko Kuroda: She is arrogant, brash, and tomboyish, blinded by her desire to beat Miki no matter what. Her motivation would reawaken even more as a runner and she found herself taking joy in exerting her newfound power and showing off to other girls.

Gabi Suburu-Kimura: He is sensitive, caring, and originally passive individual. He is kind and tries to help others, even Ryo Asuka who had lost his memory, and a critically injured cat. However, his personality undergoes a significant transformation when he is possessed by the demon hero Amon and becomes Devilman. While his human consciousness is retained, his transformation grants him the demon's strength, bravery, and fighting abilities.

Wamu: He is shy, passive, and cowardly boy who is deeply kind-hearted and good-natured. After being possessed by the demon Amon and becoming Devilman, he gains the demon's strength, bravery, and willingness to fight while retaining his human consciousness and pure heart. calm and reasonable. He was very talented and passionate as a rapper

Miki Makimura: She is brash, short-tempered, and can be provoked to violence. Though this is a side of herself that she is ashamed to show around Akira and is also shy and giddy. and also has a sassy and disgust vibes