Captain Dayang is a Mad Mallard in Legend of Mana. He can be found at Lake Kilma with a Wisp level of 3, and will join your party if you don't currently have a pet.
Wiki of Mana
Captain Dayang is a Mad Mallard in Legend of Mana. He can be found at Lake Kilma with a Wisp level of 3, and will join your party if you don't currently have a pet.