[2] After graduating from Hyogo Prefectural Sumoto Technical High School,[3] she worked as a midwife's assistant at a local obstetrics and gynecology clinic for about a year and a half.

[9] On 13 October, she was selected as the grand prize winner at the DHC Cinderella Awards,[10] and began working as an exclusive model for the January issue of fashion magazine Ray released in November of that year.

[12] In November 2015, Asahina was appointed as the "Support Ambassador" for her hometown of Sumoto City, Hyōgo Prefecture.

[13] She made her acting debut in the Amazon original drama Tokyo Alice, which began streaming on 25 August 2017.

[20] On 26 July 2021, Asahina announced her marriage to Sandaime J Soul Brothers member Kenjiro Yamashita.