There isnt even a need to translate Tsukasa's word bubble. Everyone should know what shes saying.
... Who are you?"ssu!"We can't let the club be abolished!
haibu nante damessu!I think so, too!
jibun mo sou omoimassu!Balsamic vinegar!
barusamikossu!
酢(su) = vinegarUmm...?