Fire Opal "Undyne" is a recurring character in the RP world of Steven Universe. A skilled warrior, she found Earth interesting enough to stay. She often appears alongside Moon Ammolite.
Fiery, shouty, just think Undyne.
Moon and Undyne are the Dynamic Duo. Moon's off-the-cuff plans and Undyne's fighting spirit make an unpredictable team that has been able to rescue gems from a ship with three diamonds.