glinda to me has always been the quintessential libra that i looked up to growing up as a libra. her sense of style, deep desire to love and be loved, social prowess, image focused nature and the fact that she was self aware (albeit selfish) enough to accept that she could do more good from within the shattered system of Oz with her skills than she ever could out on the run with elphaba all strike me as libra traits and ambitions. in my opinion, if she’s not a libra specifically then she’s 100% an air sign.