English: comrade / partnerChinese: 伙伴 / 搭档Japanese: 相棒
comrade / partner
伙伴 / 搭档
相棒
Childe, Shikanoin Heizou, and Navia call Traveler so. While Childe calls them "comrade" and Shikanoin Heizou and Navia calls them "partner" in English version, Childe calls them 伙伴 and Shikanoin Heizou and Navia calls them 搭档 in Chinese. In Japanese version, all three calls them 相棒.
Example
"It's a deal then, partner!"
「さすが相棒! そうこなくっちゃ!」
"I'll see you again, partner!"
「またね、相棒!」
