客 (translations)→ business buyer caller client clientele company crowd customer guest occupant party people punter visitor
兄弟 (translations)→ bro brother brotherly brothers relative sister
経営者 (translations)→ begetter keeper manager owner
相手 (translations)→ antagonist companion enemy everybody face friend grip he him interest man one other person quarry she someone they victim
相棒 (translations)→ alliance colleague pal
提携する (translations)→ affiliate collaborate