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Bubble Era (バブル, Baburu) is a series of LIGHT Aqua female cards, mostly retrains of old Yu-Gi-Oh female Normal Monsters, used by Mimi Atachi in the Yu-Gi-Oh! SEVENS anime. Their designs and names relate to the Bubble Era, as well as a general theme of the life and troubles of female office workers in Japan, such as aging, dating and partying, reflecting Mimi's status within Goha Corporation.
The Bubble Era theme focuses on playing defensively, gaining large amounts of LP while controlling several Aqua monsters.