I tried to replicate the lighting conditions of your reference image.
I created two spheres, one orange sphere with luminosity set to 7, which is "invisible" in the render settings, so that it casts an orange light onto the environment, without being visible, and a white sphere with a luminosity set to 3 and "visible to other rays" unchecked, so that you can see the white sphere, but it doesn't cast (a white) light.
This could be problematic if you'd want to have this puddle of water below the character, because the reflection would be orange as well.
There's a small lightsource that illuminates the character a bit. A quite unnatural lighting I'd say, because in the reference image nothing is lit from behind except the character.