りゅうぐうのつかいだったら
竜宮の使いだったら
ryūgūno tsukaidattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of りゅうぐうのつかい

1. If/When [one] is a messenger of Ryugu Palace.; If [one] were a messenger of Ryugu Palace.

Tara Conditional
Usually Written in Kana