YOU SAID:

As she recited her lines, my sister faded away, and in her place appeared a filly embarking on a quest.

INTO JAPANESE

彼女がセリフを朗読していると、姉の姿が消え、代わりに一匹の牝馬が冒険に乗り出した。

BACK INTO ENGLISH

As she was reciting her lines, her sister disappeared and a mare set out on an adventure in her place.

INTO JAPANESE

彼女がセリフを暗唱していると、妹が姿を消し、一頭の牝馬が彼女の代わりに冒険に出発した。

BACK INTO ENGLISH

As she was reciting her lines, her sister disappeared and a mare set out on an adventure in her place.