When you have a group of characters that are together throughout a majority of a movie, or even just a bunch of consecutive scenes, it’s fine to refer to them collectively: “The four of them walk to the building.”
If intervening scenes don’t feature the group, it’s a good idea to mention the characters each by name remind readers who is part of the group.
When dealing with a large and well-defined group — such as a football team or a show choir — it’s fine to refer to them as a group. Readers will assume the whole group is present unless you specifically exclude someone.
* [Teenage girls and gay men](http://johnaugust.com/2005/teenage-girls-and-gay-men “Teenage girls and gay men”)
* [Should I include a list of characters?](http://johnaugust.com/2009/character-list “Should I include a list of characters?”)
* [Characters who are not yet important](http://johnaugust.com/2007/characters-who-are-not-yet-important “Characters who are not yet important”)
* [Choosing character names](http://johnaugust.com/2003/choosing-character-names “Choosing character names”)