Here's an ideal prologue that will explain this "promotion", Feen: 
"Special Announcement from the headquarters!!!All members have been tested on the battlefield and their abilities were recorded. 
In regard to this, the headquarters have decided to promote all NDCS soldiers to their following ranks:"

Copy and paste those as you see them, in the member list, Phoenix

-Phoenix, Promoted to Manager Of The Team's Headquarters
-Labouka, Promoted to Head Director Of Missions And Special Assignments
-BlueK00pa, Promoted to Elite Spy - Cooperates with AngelEmpoleon
-AngelEmpoleon, Promoted to Elite Spy - Cooperates with BlueK00pa
-Phantom, Promoted to Master Weapons Scientist - Provides cutting-edge technology weapons 
-Raine, Promoted to Master Armors Scientist - Designs and manufactures the team's armors with an artistic prespective
-Darkceus, Promoted to Head planner of the team - Devises usefull strategies and plans
-Meg, Promoted to Special Agent - Extracts suspicious and useful for the team info from the underworld
-Yumi, Promoted to Main Attacker of the team - Strikes fast and viciously to keep the chat alive
-MadMustache, Promoted to Main Defender of the team - Uses her parasitic 'Staches to protect locations of high importance
-Suzu, Promoted to Pharmaceutic doctor - Makes special healing potions to tend the team's wounds from battle
-Vlax, Promoted to Mad scientist - Conducts terrible,immoral experiments that are, suprisingly, helpful for the team (does not get along with the team because of this, though)