- Birthday: May 8, 1993
- Age: 25
- Height: 152.7cm
- Joined: 2015 – Founding member and captain
- Current Groups: BiSH, ARC∀DIA, HOLY SHiTS
- Previous groups: Tsuyogari Sensation
- Previous names: Aoi Chihiro / 蒼井ちひろ
- Lyrics Written: Story Brighter, SCHOOL GIRLS, BANG BANG, BUDOKAN ka Moshiku wa TAMANEGI, Rock n’ Roll no Kamisama
- Member Colour: Light blue
She was obsessed idols when she was younger, until her favourites left their respective groups. She admits she is probably the most ‘otaku’ member of the group.
She was bullied in middle school which led her to become introverted. During this time, she focused her energy on playing softball, channelling her feelings of “I’ll show you!” and worked hard in her studying also to surpass her bullies.
Entering high school and making new friends, her confidence grew and she became more outgoing.
Previously an idol in the group Tsuyogari Sensation from August 2014 – February 2015. She performed under the name Aoi Chihiro.
She was a founding member of BiSH in early 2015.
In 2016, she became a member of NATASHA, a group formed for the JAMxNatalie expo. The group was brought back to perform at TIF 2017. In 2018, the staff decided to change the name to ARC∀DIA.
Following the WACK 2018 New Year’s live broadcast, it was revealed that she received the most fan votes to get her own solo debut. No further details have been released.
She is also a member of the WACK collaboration group HOLY SHiTS.