The Three Musketeers

The Three Musketeers (三銃士 Sanjūshi): is a set of three Knights from the Kingdom of Daedalus that has been promoted and appointed to the task of protecting the King, rewarded by their skills as knights and loyalty to their King.

Overview
Those with the title of musketeer are tasked dedicate themselves fully to the orders given to them and protect their King at all costs. While the appointment itself is enough to prove their loyalty, they're still subject to such as a strong sense loyalty that once given this appointment they're to follow their King and no other, no matter their military rank or political status; when the King gives the word and they will obey. This also means that they cannot question their King even if they themselves might not agree with his methods, they can give their advice for another solution but Alexander can naturally deny them this privilege.

It's a rank that cannot be removed unless Alexander demotes to a rank of his choosing or banishes them from the kingdom, otherwise, it'll belong to them until their last breath. But while they have it, they're bound to follow him; no matter his status, affiliation or deeds.

Trivia

 * Big thanks to Liza for creating the banner and symbol.