The Signature Line debuted with Frankie, Draculaura, Clawdeen, Lagoona as well as the Cleo/Deuce two-pack. Two new characters Ghoulia and Holt later showed up in case revisions. Two more characters Spectra and Abbey have just recently started showing up in case revisions.
Frankie: Daughter of Frankenstein
Draculaura: Daughter of the Vampire
Clawdeen: Daughter of the Werewolf
Ghoulia: Daughter of the Zombie
Spectra: Daughter of the Ghost
Lagoona 2.0 (I apparently never took deboxed photos of her O_o)
Draculaura 2.0 & Clawd