In Starbound, character appearance data is often baked into your the moment you create a character. This means that some mods only affect new characters, while others can change existing ones.
Before we dive into mods, it helps to understand the game’s architecture. Starbound stores character data in a binary .player file located in Starbound/storage/player/ . This file contains everything: inventory, quest progress, ship upgrades, and crucially, a blob of JSON data defining your species, hair, body type, and color palette. starbound change character appearance mod work