eta — on rereading your post, there may be an additional problem. Introducing people and their relationship isn’t something happening. You probably don’t want to write the scene because there isn’t a scene to write yet. You need to have something going on, and just saying “here are the characters and their relationship” isn’t going to get you there. I’d either look at the information and see if it can be worked in later in the story, or come up with something significant for them to do in a way that introduces them and their relationship. But you need something going on to have a scene, and it doesn’t appear you have that.
For clarity, I think your second answer is addressing the problem I’m having.
Structurally, from a 1000 mile high eagle eye view, I know I have a scene, let’s call it ‘scene B’, which has the protagonist and two other characters. This scene must come before any of the other scenes I’ve written. It has a tragic reveal about the protagonist within the first 500 words (the reveal is that he’s suffering from survivor’s guilt) .
[*]the two other characters are tertiary (they play no part in the main plot). Since I don’t want to confuse the reader into thinking that these characters are significant to the plot, I don’t want these two other characters in the first scene
[*] I want to ease the reader into relating to the protagonist before I make this reveal, so I don’t want the first scene to have the reveal (I’d rather the scene which has the reveal be the second scene).
I want a scene in front of scene B, let’s call it ‘scene A’. Scene A should introduce the protagonist. I want it to introduce a secondary character (his sidekick) and their relationship.
But, I don’t know what should happen in the scene.
What tricks or techniques have you used when you had this problem?