Just because they're a supporting character doesn't mean they have to do what the protagonist says.
Everyone knows the protagonist is the star of the show, but supporting characters can be just as critical to the story. They’re the ones influencing your protagonist and causing changes in the plot. Without them, your story can feel empty.
But how much time do supporting characters really need?
It depends on their function.
Supporting characters should feel credible in whatever role they’re in. The fewer scenes they get, the harder it can be to lay the groundwork for whatever their task is.
It depends on their function.
Supporting characters should feel credible in whatever role they’re in. The fewer scenes they get, the harder it can be to lay the groundwork for whatever their task is.
If the task is simple, they can show up and vanish and readers won't mind or notice anything wonky. Like a waiter at a restaurant, for example. Little is required for that role to be believable in that situation. But if the character has more impact on the protagonist or the plot, you might need better reasons for them being there.