Zagato was the High Priest to Princess Emeraude and Clef's right-hand man. When Hikaru, Umi and Fuu arrive at Cephiro, they're told that Zagato has captured Princess Emeraude and now their world is crumbling without its pillar. Zagato acts like a cold hearted man who will do anything to achieve his goal, indifferent to the chaos in Cephiro. However, his true purpose remains obscure until the girls fight him.

Spoiler

It's later revealed that he and Emeraude were in love, which caused the unbalance in Cephiro. He had imprisoned Emeraude to prevent her from being killed by the girls, according to the prophecy.