United by love and empathy, the elements of compassion are minor elements, not as "big" or "important" as the elements of harmony, but still having a decent amount of strength of their own, thanks to the strong bond shared by their wielders.

Cora Magics, the vampire batpony, wields the elements of empathy.
Merille Artiends, the artsy unicorn, wields the element of love.

(This is a rework of a silly little concept my friends and me had as teenagers; we called ourselves the "elements of true friendship". Sadly, one of these friends turned out to,,, not be a great person with a complete unwillingness to ever better herself,,, so now there are only two elements left lol)