Tiara Yumesaki

She is the headmistress of Dream Academy and the older sister of Naoto Suzukawa. Tiara Yumesaki is actually a stage name and Tiara Suzukawa is her real name.

Back when Tiara was in college, she worked as a member of Masquerade's staff. She was amazed by the idol duo like many others, but often overheard girls saying they'd like to become idols but wouldn't do it. This struck a chord in Tiara and made her wonder why the girls would give up before they'd even try.

Some time after Masquerade disbanded and Orihime was settling in as Starlight's new headmistress, Tiara went to go visit her. She noted all of the applicants and Orihime stated while there are so many, only a few would get in. Tiara, feeling bad that the girls who wouldn't make it would have to give up on their dreams, decided she'd create her own idol school that would offer alternative pathways.

It took her less than 10 years to create Dream Academy. Her policy says that "If you have the passion, anyone can be an idol", making Dream Academy more open to receive students than most idol academies.

(Source: Aikatsu! Wikia)