After my long and lengthy years of developing characters (not really) I have a nugget of wisdom for y’all.
Do this:
Look. You don’t need any artistic talent. Hell, this could be a vaguely brain-shaped oval with some words in it.
But the point of this is that you draw your character’s brains and fill it with the things they think of most, the things that matter to them most, the things that are so essential to them that they are nothing without it.
I find that doing this helps so much when shaping a character’s voice, and it visually maps out their personality in a way that character sheets can’t.
For example, my character Isha is logical and she compartmentalizes things, so I drew a more angular design, while Aster’s mind more resembles her anxiety and wandering thoughts.
Juli Fusina and More 