Princess Space Gem and Prince Time Skip, both two Alicorns with great powers. Maybe greater than those of Princess Luna and Princess Celestia. Princess Space Gem has the power to control space, keeping the universe expanding and creating stuff you would normally find in space. Prince Time Skip has the power to control time. He can go back, forth, whatever time he wants to go in. Yet these two special Alicorns are barely known among the ponies of Equestria but they don't mind. At least they have their two other siblings, a normal Pegasus named Jay Moon and a Memory-Mimicking unicorn named Memory Blood.