[quote=@TheWindel]
[@Vega7285]

In terms of their Shifted Forms, are you looking for more monster girl-ish or Kamen Rider; or a mix of both. Since you want this to be more eldritch than Magical Girl.
[/quote]

I'd probably say more a mix of both.  [url=https://i.imgur.com/zLevcG6.jpg]Here are some examples from Cthulhutech's illustrations.[/url]  Though, if you find something more human-like but still clearly monstrous, that's fine too.  I'm cool with taking plenty of liberties as-is, but hopefully we can at least avoid everyone being really cute horrible monsters or something.