User blog comment:DatAsymptote/Regarding Mythology OCs/@comment-4598697-20160331193737/@comment-3991308-20160401072355

Yep, we have discussed plans for a guideline of novel children as well. This one will be slightly more difficult to compile due to the variety of novels people have considered making for EAH, but hopefully it'll be just as clear & methodical as this guide.

Same. But it should be noted that figures from religion, like angels and devils and demons (provided that they come from a fairytale or fairytale-sque source) are definitely alright on the Wikia.