Diam was a member of Magistrum's court, appearing briefly in Shin Devilman.
Diam was a humanoid demon with fish like qualities. He had a set of three ridge-shaped fins on his head and gills on his stomach, his skin was covered in black markings.
- Diam like several other demons of the Court is seemingly based on a demon from the original manga, in Diam's case it was the demon Najuwarle.
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