Suganuma was the manager of Nami Kayami and despite getting on very well with her, Nami's mother was often very short tempered and rude to her, even trying to kill her when in her Devil Beast form.


She was a well educated good looking Japanese woman presumably in her late twenties or early thirties.


She is seen sitting next to Nami Kayami reading about ancient myths, Nami asks about one in particular which Suganuma calls a Siren, a creature that was either a mix of a woman and fish or a woman and a bird, she then goes on to say that the fish version was far more well known than the bird version was but says she remembers seeing the bird variant in an old anime she watched as a kid, the character being Sirene the anime being Devilman. Not much later Nami's mother bursts in and starts to shout at the two saying that Nami should have prepared long ago, Suganuma apologizes and leaves while Nami gets ready for her performance.