Talk:Hym/@comment-137.186.164.220-20151011221942/@comment-2601:405:8402:10F8:4BD:E76:88B6:25C3-20190815165155

Seems to be completely made up by the writers. The hym does seem to derive many characteristics from other folklores about similar demons. It also seems to be symbolic of mental disorders such as Schizophrenia and Suicidal Depression.