This concept is a good base but you need to add some colours. I'd suggest the standard approach - a bunch of thumbnails with blocked out silhouette to find the shape you like, then some slightly larger thumbnails exploring the colour scheme, then you'll have enough discovery to finish off this concept.

Cute smiling elf girl is definitely an odd target for murder but hey it's a video game, people will kill anything

It depends on the game type. If it's about killing things, player won't hesitate to kill her. But if it's about talking, player can't kill her.