Apart from avoiding using personal pronouns, when speaking to royalty, would one just use watashi, like in the following example:
Time: 05:32 - 05:50
「お天気のことですか。生き物たちも皆おかしくなっちゃってるし、私の魔法も効かないし、これって。。。」 (edited with help from KyloRen)
Or would one use a different pronoun in real life?