User blog comment:B214/Shin DxD 1 discussion/@comment-71.120.184.206-20180630175929/@comment-2601:8C:601:5692:D525:C8BE:866A:7175-20180702140554

Wouldn't it be funny if your joke turned out to be true? But still, for someone to take that part seriously...

More likely she is the devils' equivalent to a siren or something like that, considering her connection to music. Well, Demonicjester01's suggestion that she has a connection to Nereid Kyrie is possible as well.