nitpicker
🇺🇸
/ˈnɪtpɪkər/
🇬🇧
/ˈnɪtpɪkə(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.
내 동료는 너무 세세해서 보고서의 모든 쉼표를 확인합니다.