Agwel is a small, slime-like demon whose only distinguishable features are his deeply sunken eyes, his mouth full of razor-sharp teeth, and a pair of antennae. Its body, for lack of a better word, was a grotesque translucent blob of slime, that melted and morphed at Agwel's will.
Agwel is able to render himself and his surroundings tangible and intangible at will. His large teeth are effective for biting opponents, particularly when they are restrained by him.
Agwel had a rather unique manner of speech, cruel and sadistic with an artistic flair. He frequently referred to himself in third person and had a manic glee in killing.
Before the decisive battle, the beautiful demoness Sirene summoned fourth both the blob-like Agwel and the reptilian water-demon Ghelmer.
As Ghelmer sped inside to attack Miki Makimura, Agwel set his sights on her parents, sucking Kozo and Akiko Makimura into the walls. Both of which are discovered by Tare Makimura, and then Akira Fudo shortly after. Akira tells Tare to hide in his room, hearing a shrill scream from Miki just after. Akira tries to break into the bathroom to save Miki, but found himself being sucked into the floor. Agwel introduces himself and cheerily threatens Akira, who beats Agwel back causing the demon to retreat.
After recovering Miki from Ghelmer's watery clutches, Agwel attacks again but Akira, who was in his mid-transformation, wrapped his antenna around Agwel's neck and with some force, pulled off the demons head. Agwel spurts out a final threat before dying, promising to meet his foe in the afterlife.
- Agwel has only had one figure released, that being the pawn in the Devilman chess set series.
- Agwel was advertised by Marmit to get a figure, but sadly it never got released.
- In said advertisement, Agwel was given a green colour scheme.
- The blob demon is sometimes confused with a similarly designed demon named Urutph, the confusion isnt helped by the relatively close appearances they have with one another, with Agwel appearing just over twenty pages after Urutph was seen.
- Agwel makes a cameo appearance along with Akira, Sirene, Ghelmer and multiple Mazinger Z characters in the Hannape Bazooka OVA.