Whether or not you conflate them probably depends on your specific circumstances - for example, do you have a gag-a-day comic, or a story comic? If you do conflate one or more you can probably label it with anything it fills the role of. Regardless, I would draw the boundaries like so:
- About: Basic information about the comic, and optionally, about the author. A quick and dirty way to get acquainted with the setting or the concept. A comic FAQ might fall under an "about" header.
- Cast: Information about the cast, their personalities, and where they are in the story.
- New Readers: A more advanced form of the About page, explaining "the story so far", reducing the reader's need for an archive binge. May contain links to relevant storylines, for example, if the reader wants to "experience it for themselves".
(No, you did not just stumble into the Floating Lightbulb by accident.)