Their professional roles overlap within the royal household, where personal loyalty supports official service.
Greer serves in Mary's household from the pilot onward and remains involved in court missions and protective schemes.
Knox functions as a recurring embodiment of the religious and constitutional forces opposing Mary's sovereignty.
The Scottish monarchy's survival and Mary's legitimacy are repeatedly threatened by Knox's campaigns and alliances.
Their conflict represents the larger struggle between sovereign legitimacy and aristocratic political leverage.
Mary's decisions repeatedly respond to Narcisse's manipulation of the court, his regency, and his involvement in factional conflicts.
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Related entry on Wikidata (Q131412), public domain (CC0).