Developing big casts

Here are some suggestions for handling a “cast of thousands.” Don’t introduce them all at once is the first piece of advice. This article doesn’t get into it, but you should probably consider whether you need them all, too.There’s a link to a previous post addressing that question inside “5 Tips.”

5 Tips For Writing Large Casts of Characters – The Storymonger.
http://thestorymonger.com/writing/characters/5-tips-for-writing-large-casts-of-characters/