User blog comment:CureStar/Why Doesn't Hummy Have a Human Form?/@comment-4203078-20111015152642/@comment-28808867-20111015181223

hummy never joined Mephisto, but if you're talking about Siren, yes she lost the ability to take form of her own human, and take others appearance, when she broke the neclace when she first transformed into Cure Beat in Ep 21