- ごぼてんよりもカニカマが大好きな(最近ブームが消えつつある。) 23歳、夢は宇宙人と友達になること。小田彩加です！よろしくお願いします。
- Goboten yori mo Kanikama ga daisukina (saikin BUUMU ga kietsutsu aru.) 23-sai, Yume wa Uchūjin to Tomodachi ni naru koto. Oda Ayaka desu! Yoroshikuonegaishimasu.
- I like Crabsticks more than Goboten, (Lately the hype is going down.) 23 years old, my dream is to become friends with an alien. I'm Oda Ayaka! Nice to meet you.
AKB48 Senbatsu Elections
- Hakusen no Uchigawa de (Bagutte Iijan)
- Boku Dake no Hakujitsumu (Bagutte Iijan)
- HKT48 Family (Bagutte Iijan)
- Sakuranbo wo Musuberuka? (Kiss wa Matsushikanai no Deshouka?)
- Tonari no Kare wa Kakko yoku Mieru (Kiss wa Matsushikanai no Deshouka?)
- Koisuru Ribbon! (Kiss wa Matsushikanai no Deshouka?)
- Aitakute iya ni Naru (Hayaokuri Calendar)
- Dare Yori Te wo Furou (Ishi)
- Itsudatte Soba ni Iru (Ishi)
- Oshaberi Jukebox (3-2)
- Seishun no Deguchi (3-2)
- HW2 (Tadaima Renaichuu)
- 7ji 12fun no Hatsukoi
- TII1 (Te wo Tsunaginagara)
- Wimbledon e Tsuretette
- Kono Mune no Barcode
- Choco no Yukue
- Glory Days
- Ame no Pianist
- H4 (Theater no Megami)
- Candy (Support)
- Locker Room Boy (Support)
- KIV3 (Seifuku no Me)
- Ookami to Pride (Support)
- Onna no Ko no Dairokkan (Support)
- H5 (RESET)
- Kokoro no Hashi no Sofa (Support)
HKT48 2016 Summer Hall Tour ~Will HKT break away from the AKB48 Group? Referendum Concerts~
- Hobby: Astronomy, Researching recipes
- Special Skill: Tea ceremonies, table tennis, looking at people's aura
- Charm Point: Baby-face
- Good friends with: Otoshima Risa
- Her favorite color is yellow.
- Members sometimes pronounce her nickame as O.D.A, saying every letter out loud in English as a reference to her obsession with UFOs.
- Is an airhead. She once misheard LINE as Lion, finding it odd how she was being asked to add people on a savannah animal rather than on a messaging application.
- She appeared on the TV show HKT48 no Goboten! twice before her debut, once with Sashihara Rino and another time with Komada Hiroka and Matsuoka Natsumi. During the episode Matsuoka Natsumi commented about how Ayaka would be a good candidate for the next generation of HKT members. However, after joining Natsumi said that the silent, airheaded girl ended up also being obsessed by UFOs.
- Forms the unofficial Teneppa (sweaty hands) alliance with Sakai Moeka and Unjo Hirona
- Tested positive for COVID-19 on August 9, 2021