From Destinypedia, the Destiny wiki
A Minor is a low-level enemy of any species or class. They can be distinguished by their red health bars and non-unique names. These enemies have often very low health and are seen in large amounts than other tougher enemies, and may rarely be equipped with absorption shields. Minors can appear anywhere from Patrols to Raids and can come in the form of any enemy species. In Destiny 2, Minor enemies were given tougher variants known as Elites which are toughened variants of Minors, however, still far weaker than Majors. Due to the high amounts Minors are encountered in and their often cannon fodder role, they are often also referred to as 'adds'.
List of appearances