Prince Casey of Eldorado

Prince Casey Miguel of Eldorado is the third and youngest child of Riven and Musa. He's the younger brother to Melody and Harmony.

Appereances can be decieving - Epilogue
Casey first appereared in the last chapter of Appereances can be decieving when he waited for his sisters coming home for the summer from studying in Magix. He seemes to be close with his cousins, especially Xander and Liam.

Eldorado - Next Generation
In the beginning of the story it's mentioned that Casey has applied to study at Red Fountain and is waiting to find out if he passed or not. Sadly he didn't and is really disappointed. His family is trying to be supporting and tells him that he can always apply again for next year, Harmony tries to cheer him up and lies to him, telling that it's not even that great. He is touched that she's trying, but he's overheard her talking to their father about how great it is.

When the mermaid Sailor is kidnapped, he joins Liam, Xander and Harmony to rescue her, and during the mission he saves his sister when the Ragnopion is about to poison her with its sting.

A few days later, he recives a letter from the Red Fountain appecting him into Red Fountain for his bravery during the resue mission.