|Nickname||Marina (マリーナ), Tenrai-chan (天来ちゃん)|
|Birthdate||February 14, 2004|
|Current Age||15 Years Old|
|Agency||Setouchi Co. Ltd.|
|Idol Career Info|
|Debuted||March, 2017 / 1st Generation|
- Joined Actors School Hiroshima (ASH) as a member of the 27th generation.
- On December 17th, was selected to be one of MAX♡GIRLS's (Actors School Hiroshima idol unit) new members.
- On March 19th, passed the auditions for STU48's 1st Generation.
- On March 30th, during ASH 2017 SPRING ACT, it was announced she will stop her activities as a member of SPL∞ASH and graduated from ASH.
- On March 31st, joined STU48.
AKB48 Senbatsu Elections
- STU48 (Kurayami)
- Hi Zenryoku (Kurayami)
- Shukko (Kaze wo Matsu)
- Genten (Kaze wo Matsu) (Center)
- Which is which? (Daisuki na Hito)
- STU1 (GO!GO! little SEABIRDS!!)
- Megumi no Hito
- Showroom Audition Number: #10
- Favorite Members: Tanaka Miku, Habu Mizuho
- Admired Member: Yamamoto Sayaka
- Favorite Food: Saury, macaron
- Special Skills: Singing and dancing
- Hobbies: Singing, dancing, watching movies, manga, anime
- Former Actor School Hiroshima (ASH) student and a member of MAX♡GIRLS.
- Likes heavy metal
- Youngest of three
Otani Marina 10th Senbatsu Election Poster (2018)
Otani Marina (2018)
Otani Marina 9th Senbatsu Election Poster (2017)
Otani Marina (2017)
Otani Marina (April 2017)
Otani Marina before joining STU48
| Ishida Chiho | Ishida Minami | Isogai Kanon | Imamura Mitsuki | Iwata Hina | Okada Nana | Otani Marina | Kai Kokoa |
Kadowaki Miyuna | Sakaki Miyu | Shintani Nonoka | Takino Yumiko | Tanaka Kouko | Taniguchi Mahina | Hyodo Aoi | Fukuda Akari | Fujiwara Azusa
Mishima Haruka | Mineyoshi Arisa | Mori Kaho | Morishita Maiha | Yano Honoka | Yabushita Fu | Oki Yuuka | Shinano Soraha | Nakamura Mai