She formed the singing duo Hikanon together with labelmate Hikaru Koide; the duo performed the song "Smile Invitation" which was used as the theme song to Musekinin Galaxy Tylor.
In 2014, Takao participated in a voice acting audition held by the publishing company Earth Star Entertainment. She was declared one of the audition's two winners, along with Yuki Nakashima.
Her older brother Sonosuke is a pianist and composer.
She learned to play the piano at an early age, and she won an international piano contest held in Milan, Italy, when she was 10 years old.
She then joined the talent agency Link Plan in September 2018.