White and Black

The two main characters of my RP group which is in WIP
In the story, they're widely known as the Ruler of Ice and Storm elements and Ruler of Fire and Heat elements. Both of them are supposed to keep the balance of the world as they are the center of power users and the energy of the world. But for unknown reason, the Ice Ruler plans to kill the Fire Ruler and become the most powerful being in the universe. No one knows what made her thinks that way. Because if she succeed, it will break the balance and the world would fall apart. Fearing that, the Lords of North and South planned to seal her away and protect the Fire Ruler so that the balance of the world would be saved. Now, the point of this group is which side are you on in this chase?
And I call them Ice Ruler and Fire Ruler there because I haven't decided good names for them and that's the problem
Here are the list of possible names for them:
White: Eiris, Aeriel, Erin, Eira, Oriencor, Lumi, Neva, Kura, Khionne
Black: Lisa, Aidan/Aideen, Titania, Serafina, Ravenna, Celosia, Emma, Rhea, Ivy
Which one do you think are good names for them? Or please suggest other good names too...... Help me man....