The phrase 'We Are X' is best known as the slogan of X Japan, the influential Japanese rock and metal band formed in the 1980s, and as the title of the 2016 documentary about the band. Fans chant it at concerts as a statement of identity, which is why the line circulates online as a short hype clip. Creators borrow it for the same reason: three short words that instantly signal unity, fandom and dramatic arrival, especially in anime, music and gaming edits.