the other person; the other party, the opponent, As for someone’s partner or companion…
You’re saying the person on the phone is Representative Fraga?
— エリート・スクワッド ブラジル特殊部隊BOPE (2010)
I’m telling you, I’m your opponent!
— Demon Slayer -Kimetsu no Yaiba- The Movie: Mugen Train (2020)
As long as no one gets in the way, it’s fine to crush anyone who isn’t an executive.
— グッドフェローズ (1990)
Besides, you can't handle it alone... Your opponent is a sick old man.
— サイコ (1960)