As I mentioned a few chapters ago, background characters are characters who appear in the story, but aren't important. They're there mostly for face value. So, this profile is actually super easy and doesn't really even need to be made, technically.

Name:

Eye Color:

Hair Color/Length/Style:

Skin Color:

When they appear/what they do:

In a previous chapter, I said Ginny Weasley was a background character. Her profile would be:

Name: Ginny Weasley

Eye Color: Light brown

Hair Color/Length/Style: Red, shoulder length, straight

Skin Color: Pale

Purpose/When they appear: In King's Cross as Ron and Harry go to Platform 9 3/4 and says "good luck" to Harry.