I found some PreCure's that match some of the Nightmarens. Haven't found one for Sleph yet.

Reala = Cure Chocolat

NiGHTS = Cure Macaron

(The likeness between them is unbearably true)

Jackle the Mantle = Cure Mofuren

Anyone see the likeness of these PreCure's of who I matched them with?

BloodyKidneyPrincess
IAmASmolPerson
the_laurmau_fangirl
That_Fangirl_Rachel
Eh_Fuck
AmeliaDeath-chan

If you forgot what NiGHTS and Jackle look like then boom.

NiGHTS

Jackle