The Sapphire Seal Pageant
The quest is unlocked after completing the Each Step Like Thunder scenario.
"In a few days' time, Riju will emcee a new sand-seal beauty pageant! Sand-seal owners from all over Gerudo Town are scrambling to find a certain jewel that is required for entry..."
"Dressed from head to flipper in finery, the statuesque sand seals strutted and surfed before an adoring crowd. The Gerudo riding these beautiful seals could not have been proouder."
- Riju: Bonus Combo