- Name: Nishida Shiori (西田汐里)
- Nickname: Shiorin (しおりん)
- Birthday: June 7, 2003
- Birthplace: Kyoto, Japan
- Blood Type: B
- Height: 149cm
- Specialty: Massage
- Hobbies: Watching videos, copying Hello! Project dances
- Looks Up To: Fukumura Mizuki
- Hello! Project groups:
- Hello! Pro Kenshuusei (2016–)
- Unnamed Group (2018–)
Nishida Shiori first appeared as a member of Hello Pro Kenshuusei in an official website update on August 17, 2016, alongside fellow members Kawamura Ayano, Yokoyama Reina, Yoshida Marie, Yamazaki Yuhane, and Hashisako Rin. She made her first live appearance and was formally introduced the following month at the "Hello! Project Kenshuusei Happyoukai 2016 9gatsu ~SINGING!~" recital on September 4th.
Nishida was awarded the Judges Character Award on May 6, 2018 at the "Hello! Project Kenshuusei Happyoukai 2018 ~Haru no Koukai Jitsuryoku Shindan Test~" event afer performing "Golden Chinatown" by Berryz Kobo. On June 9, 2018 during the "Hello! Project Kenshuusei Happyoukai 2018 6gatsu ~Niji~" event in Tokyo, it was announced that Nishida would join the upcoming group featuring previously announced leader Ichioka Reina, along with Shimakura Rika and Eguchi Saya. The group would be unveiled at a later date in 2018.
-  JK Ninja Girls (JKニンジャガールズ)
- Music Videos
-  Nega Poji Poji (ネガポジポジ)
-  Bokutachi Karen na Shounen Gasshoudan (僕たち可憐な少年合唱団) (as Yoko and Yohan, team ♯Gumi)
- Considers her charm point to be her dimples.
- Her favorite music genre is J-Pop, mainly Hello! Project.
- Her favorite sport is dance.
- Her motto is "Don't forget to be grateful" (感謝の気持ちを忘れずに).
- Favorite food is matsumae pickles.
- Shares a bed with her parents because she has trouble sleeping alone.
- Her favorite color is dark pink.
- Her favorite Hello! Project songs are "Love & Pea~ce! HERO ga Yattekita." and "The Vision" by Morning Musume.