- Birth Name: Hirata Shiina (平田詩奈)
- Nickname: Shiichan (しいちゃん)
- Birthdate: August 22, 1999
- Birthplace: Aichi, Japan
- Blood Type: O
- Height: 157cm
- Bands / Groups:
SKE48 Song Participation
|Ikinari Punch Line||Rei no Potato Chips||Kenkyuusei & Draft 3rd Generation|
Center w/ Nishi Marina
|Stand by you||Iriguchi||Team E|
|Kamisama wa Misutenai|
|Frustration||Se~no de Iouze!||Coming Flavor|
|Souyuutoko Aru yo ne?||Kimi no Inai Sekai||Coming Flavor|
|Koi no Konkyo||Highway Girls - Center|
- Originally a candidate for the 3rd AKB48 Group Draft, she was drafted by SKE48 Team E in the second round and remained in Kenkyuusei until she was promoted to Team E on September 16, 2018.
- Her first choice as a draft member was NMB48 or SKE48.
- She doesn't want to lose and thinks positively, but she has a "my pace" personality.
- Her hobbies include fashion research and visiting cafes.
- Her special talent is badminton.
- She admires Watanabe Mayu.