"Princess Emeraude's prayers are what supports the world of Cephiro, which is why she's also known as the 'pillar' of Cephiro. In fact, Cephiro's condition is simply a reflection of Princess Emeraude's heart. At this point, Princess Emeraude isn't able to pray for Cephiro's peace and safety, which is why there are so many monsters and evil spirits running around Cephiro causing strife, confusion, and other really annoying stuff. Princess Emeraude isn't quite as old as Clef, but she's still ancient, even though she looks like a little girl..."
She is the pillar of Cephiro. Before she was kidnapped by Zagato, she protected Cephiro with her prayers.