In Blue Archive, Arius Squad is one of the clubs at Arius Satellite School.
An elite team formerly consisting of five members hand-picked by Beatrice, yet only seen by Her as mere pawns ready to be disposed of at any time. Commonly referred to as Squad, they were responsible for the assassination attempt of Seia and the attack during the signing of the Eden Treaty. If Azusa is also present, please add spoilers.
Being a faction tag, this should only be used when all members of the group are present and equally in focus.