Zircon is Zirconia's pet eyeball, with wings and a flame. He usually resides on Zirconia's staff, but also goes out in search of targets for the Amazon Trio and Amazon Quartet, taking pictures of those he thinks might be the one whose dreams Pegasus is hiding in.
In Episode 22, Eternal Dreams, Zircon was spying on Serena and Fish Eye, and because of this, as well as Fish Eye saying she knew who the holder of Pegasus was, Zirconia assumed that she was referring to Serena.
Zircon was often being chased around by the Amazon Quartet.
He was destroyed along with Zirconia when Queen Nehelenia escaped from her mirror.