Sylunis is one of the main antagonist in Crusaders Quest. She stole the Apostle's shard trying to bring the Apostle's back again. In the final stage of Normal Mode, Sylunis tried to use the shard to have its power, but she became weak due to her last confrontation with the "Hero" and the Goddesses. She also knew that Sera can stand against the power of the shard and because she doesn't want to lose its power, she gave the shard's power to Sera, making Sera being corrupted by the power of the Apostle's shard.
- Sylunis has a sister named Aubrey, which is also the Sea Goddess.