I'm going to throw a number of my characters out there and see what strikes artist's muses.

A young halfling woman with prematurely-white hair and ice-blue eyes wearing shirt and trousers and casting some sort of ice spell.

A heavily burn-scarred male elf with red hair casting some sort of fire spell.

A halfling woman with black hair wearing red monk's robes in a martial arts stance.

A black-feathered tengu in saffron robes taking careful aim at something-off panel with a musket.

A brown-haired half-elven woman, dressed as a male nobleman, singing and brandishing a falcata.