A nun's traditional habit, specifically referring here to the Christian style (Catholic, Orthodox, etc), as opposed to adapted styles typically seen outside of religious contexts. It consists at most of a long dress with long sleeves and a guimpe, and typically stars the distinctive nun coif and veil (and may also include a tabard, underdress, and so on). The habit is typically white-on-black, with black the predominant color, but they can also be wholly white or white-on-blue.
The traditional habit can be accentuated with minor additions, but not so much that it detracts from the basics (ex. Sister Cleaire and Double as opposed to Specter and Index), and some degree of modesty must be adhered to (ex. not too tight-fitting, no cutouts, no side slits which reveal skin or undergarment, no overtly sexual depictions of certain undergarments, etc).
