Debuted in 2018 as Leia Hoshino (星乃 レイア)
Her former agency was BELLTECH PRODUCTION
On March 4 2019, She created a new Twitter account as "Rei Hanamiya". She reported that she changed her agency (belonging now to Krone).
Hobbies include walking, gym, playing games, watching movies, and cooking.
According to an interview, her first experience was in her boyfriend's room in the third year of junior high school.