nitpicker
🇺🇸
/ˈnɪtpɪkər/
🇬🇧
/ˈnɪtpɪkə(r)/
noun
R
A person who is overly concerned with minor details or faults.
My coworker is such a nitpicker that she checks every comma in the report.
私の同僚は非常に細かいことで、報告書のすべてのコンマをチェックします。
translation
細かいことにこだわる人