Rapp is a flintlock-type firearm historically tied to General Jean Rapp, personally gifted by Emperor Napoleon. Standing 183 cm tall, his design embodies martial aesthetics reflecting this military heritage. As Napoleon's adjutant, a solemn vow of service defines his character, marked by unwavering loyalty and dedication to his commander. This relationship anchors his primary narrative function within the Napoleonic-aligned Musketeers hierarchy. Personal interests in horse riding and hamburger steaks offer civilian counterpoints to his duty-bound persona. Throughout the series, he deploys his flintlock capabilities in combat, frequently acting alongside or in direct support of Napoleon. His portrayal remains consistent as a disciplined and devoted subordinate.