How do I rename my creature?

Creatures all come with a name picked just for them by Midas and Liya, but if you want to give them a new one they won't be offended!

You will be able to rename them once you find the Ability Star for Creature Renaming in the Sapphire Sanctuary Garden. Once you do, you can select any creature in your Creature book, then tap on the Pencil icon next to their name to fill in a new moniker of your choice!