Backgrounds: A white, sandy beach with a cliff and glacier behind it for Water showing its affinity to Ice and Water. And/or a frozen waterfall. Lots of unique things you could add to it. A fish frozen in the waterfall. A polar bear walking underneath. Etc. Many ways to make it common or rare.
An overflowing volcano with a dark sky and lightning bolt striking it to show the Light's affinity to Fire and Electricity. Could be the Male. Female could be Lightning Bugs and Fireflies...
A forest with a long, grassy field in the foreground with a few critters (ants, spiders, etc) to show the Forest healers affinity to Nature and Bugs. Again, Male could be more aggressive and female could have butterflies and grasshoppers or something.
Obviously you don't want to make it sexist, but it IS a game and whatever gives people the right aura, for lack of a better word, is what you want. Some people will gravitate towards the aggressive and some will want the sweet.
Accessories: Earrings--little lightning bolts & comets, bugs, flowers & butterflies, icicles & mini-waves.
That's all I've got. Lots of ways to make these unique and valuable as there could be many variations of each.