occupant

noun [专属名词]居住者，住户；（某一时刻房间、交通工具、床等的）占用者；（职位或官职的）占有者；<法律>（尤指土地的）实际占有人

The dusk light was failing and the interior of the pickup was dark but she knew the occupant was staring at her.
黄昏的光线逐渐暗淡下来，皮卡内黑漆漆的，但她知道占有者一直在盯着她。