Gryffindor: Brings their voice and spirit to cheer.

Hufflepuff: Brings posters, glowsticks, and light sticks to share with their friends during the concert, and snacks for the idols.

Ravenclaw: Brings cameras and autograph books, and practice and rehearse what to say to the idols when they greet them.

Slytherin: They either go to the concert, or they don't.