Celestia Ludenberg

Celestia loathed her true self and the common world she was born into, considering her given name of Taeko Yasuhiro a "loser's name", and so sometime during her childhood, Celestia retreated into an obsession with European royalty - particularly of the Victorian and Rococo period and European historical figures like Marie Antoinette. To make her life appear more glamorous, she took on the European-sounding name "Celestia Ludenberg" and concocted a fictional backstory for herself in which her father was a member of the French nobility, and her mother was a member of a German family of musicians. She began adopting a fake ambiguous European accent and wearing and designing her own well-known line of lolita fashion. Her ultimate dream in life was to own and live in a European castle filled with handsome male servants dressed as vampires, and this dream is what led her into the world of gambling in order to raise the significant amount of money she would need. Her rise to notoriety within the gambling scene brought her to the attention of Hope's Peak Academy scout Koichi Kizakura, leading to Celestia being chosen to enroll in the 78th Class as the Ultimate Gambler. The reason Celestia agreed to enroll in the 78th Class was the urge to achieve even more notoriety and success so she could quickly actualize her dream of becoming something like royalty herself. In one photo recovered by Makoto, Celestia is shown playfully attacking Hifumi Yamada. Little else is revealed about her relationships with the other members of the 78th Class, but it's hinted that Celestia had at least a few friends.