Irregular

Irregular in Code Geass refers to any non-standard military usually it refer to special or powerful unit and it can sometimes it can be a single person, the Camelot which is actually more of a Research and Development team is still considered to be an irregular unit under Prince Clovis.

For more information see Irregular

List of Irregulars in Universe

 * Camelot
 * Rolo Lamperouge
 * Britannian Special Honorary Foreign Legion