I think this counts as character development because assigning a song or two to a character definitely helps with figuring some stuff out. For example, one character in this list, Glowworm, she was assigned a song when I got her, and I built her whole bio off that and the other one I gave her immediately after that.

Most of the characters here are Wings of Fire OCs.

(Looking at the list again, gee I wonder who my favourite artist is)

Azmia
"Why Do You Let Me Stay Here?" by She & Him
"Poet" by Fish in a Birdcage

Ozul
"Ivory Tower" by Matthew John
"Problems" by Mother Mother
"Cut My Fingers Off" by Ethan Bortnick
"Father" by The Front Bottoms
"Brave" by Fish in a Birdcage

Albzul (ship)
"Guillotine" by Jon Bellion

Sein
"My Dream, My Addiction" by Fish in a Birdcage
"Real As Ever" by Jack Harris

Albtraum
"Amigo" by Fish in a Birdcage

Morey
"Both" by Todrick Hall
"Kissing Strangers" by DNCE

Delphi
"Preybirds" by Rabbitology

Aveni
"Never Love An Anchor" by The Crane Wives
"Harpy Hare" by Yaelokre

Lovely
"Alicia from the Store" by Blue Cricket

Apiomerus
"Zydrate Anatomy" by Paris Hilton

Scorpio
"Child of the Stars" by Fish in a Birdcage

Sugar
"EVERYTHING" by LuLuYam
"Siren" by Kailee Morgue

Fennec
"Abandon Ship" by Steffan

Styx
"If I Had A Heart" by Fever Ray

Stachys
"Personal Jesus" by Depeche Mode
"Wool Over Our Eyes" by The Stupendium
"Bernadette" by IAMX

Glowworm
"Did I Make You Up?" by half•alive
"Dead Come Talking" by Roe Capara

Stitches
"Body" by Mother Mother

Black Mold
"Laplace's Angel (Hurt People? Hurt People!)" by Will Wood

Lantern
"She" by Dodie
"Strawberry Blonde" by Mitski