YOU SAID:

who do I do this to with whom

INTO JAPANESE

誰とこれを誰とやりますか

BACK INTO ENGLISH

Who and who do this with

INTO JAPANESE

誰が誰とこれを行うか

BACK INTO ENGLISH

Who does this with whom

INTO JAPANESE

誰がこれを誰と

BACK INTO ENGLISH

Who is this with whom

INTO JAPANESE

これは誰と誰ですか

BACK INTO ENGLISH

Who is this and who

INTO JAPANESE

これは誰ですか

BACK INTO ENGLISH

So who's this guy?

INTO JAPANESE

こいつは誰だ？

BACK INTO ENGLISH

- Who's that?

INTO JAPANESE

- あぁ あいつは？

BACK INTO ENGLISH

- Who's that?