Like this! https://www.weasyl.com/submission/952434/coloured-sketch-info

More examples:
https://www.weasyl.com/submission/882784/coloured-sketches-sale

$20 per character, flat colour; $30 per character with shading. No changes unless I miss a detail from your ref sheet or description. Turnaround time is roughly six weeks. Comment below or note me if you're interested. :)