Characters: X-Men [Cyclops; Wolverine; Storm (cameo); Iceman (cameo); Beast (cameo); Nightcrawler (cameo); Colossus (cameo); Angel (cameo)]; Madelyne Pryor; Mariko Yashida; Caliban; Callisto; Sunder; Masque; Henry Peter Gyrich; Valerie Cooper (1st appearance)