A "fastidious" person is likely to be:

A fastidious person is characterized by an excessive concern for cleanliness, precision, and detail. This term typically describes someone who pays close attention to finer points and is meticulous in their approach. Such individuals are often very particular about how things should be done and may have high standards for the quality and presentation of their work or environment.

This focus on tidiness and detail sets them apart from others who are indifferent to details, accepting of varying conditions, or exhibit spontaneous and carefree behavior. For a fastidious person, the desire for order and thoroughness profoundly influences their actions and preferences, underscoring why the choice reflecting extreme tidiness and detail orientation is the most appropriate answer.