- Birth Name: Ozeki Mai (小関舞)
- Nickname: Ozekichan (おぜきちゃん)
- Date of Birth: February 10, 2002
- Place of Birth: Tokyo, Japan
- Blood Type: O
- Height: 154cm
- Specialty: Violin, dancing
- Hobby: Singing, going out with friends
- Favorite Color: Pastel blue, emerald green
- Looks Up To: Yajima Maimi, Suzuki Kanon
- Hello! Project groups:
- Country Girls (2014–)
- [2016.04.xx] Greeting ~Ozeki Mai~ (Greeting~小関舞~)
- [2017.04.29] Ozeki Mai Mini Photobook "Greeting -Photobook-" (小関舞ミニ写真集「Greeting-Photobook-」)
- [2016.09.24] Country Girls 1st OFFICIAL BOOK (カントリー・ガールズ 1st OFFICIAL BOOK)
- TV Programs
- [2015–] The Girls Live
-  Country Girls no Tadaima Radio Kenshuuchuu (カントリー・ガールズの只今ラジオ研修中)
-  Kizetsu Suruhodo Aishiteru! (気絶するほど愛してる!)
-  Harukanaru Toki no Naka de 6 Gaiden ~Tasogare no Kamen~ (遙かなる時空の中で６ 外伝 ~黄昏ノ仮面~) (guest)
- Her official Country Girls image color is medium blue.
- Was formerly with the agency Tambourine Artists.
- Participated in the Morning Musume 12th generation "Golden Audition".
- Her father is Ozeki Tatsuya, coach for the Yomiuri Giants baseball team since 2011.
- Her favorite sports are baseball and basketball.
- Has taken violin lessons since she was four years old.
- Thinks she has the best figure in Country Girls.
- Her favorite Hello! Project song is "Munasawagi Scarlet" by Berryz Kobo.