YOU SAID:

You're the best step sister I could've asked for

INTO JAPANESE

あなたは私が頼むことができる最高の妹です。

BACK INTO ENGLISH

You are the best sister I can ask for.

INTO JAPANESE

あなたは私が求めることができる最高の姉妹です。

BACK INTO ENGLISH

You are the best sister I can ask for.