I think it would be a lot easier if it was possible to add Main Cast to episodes, with the option of typing in their character name as especially with kids shows and long-running shows as character names can change over a period of time.

What are everyone's opinions on this?

The way I've been doing it, is to add the main cast member as a Guest Star & using the Featured option and listing the character they happen to be voicing in that episode.

Recently all gone well.