Aurora Mage

Aurora Mage is a legendary skin from the Heroines collection. It's a feminine look, drawn for the slim (Alex) model with 3-pixel arms, so choose that arm type when you apply it.

The palette is a light indigo hood, a dark indigo starfield top and cyan crystal legs. Look for long hair. Download the 64×64 PNG, then upload it under Skins in the Minecraft Launcher for Java Edition, or import it from the Dressing Room in Bedrock Edition.