Aika Ota
[2] Ota joined AKB48 as part of Original Team B, also known as 3rd Generation, along with her teammates Kashiwagi Yuki and Watanabe Mayu.Before Watarirouka Hashiritai debuted and Natsumi Hirajima was added, It was known as "Okashina Sisters" (お菓子なシスターズ) which consisting her, Nakagawa Haruka and Mayuyu, According to Akimoto Yasushi, The name Okashina Sisters is a pun on okashi (お菓子), meaning "sweets", and okashii na (可笑しいな), meaning "amusing" or "strange" and Watarirouka Hashiritai officially debuted in January 2009, releasing their 1st Single and double single "Hatsukoi Dash/Aoi Mirai".She officially debuted with HKT48 in November 2012 and was promoted to Team H. In AKB48 32nd Single Senbatsu Sousenkyo, Ota ranked 43rd place with 16,401 votes and became Next Girls, On 11 January 2014, when HKT48 held their concert "HKT48 Kyushu 7 Prefecture Tour ~Kawaii Ko ni wa Tabi wo Saseyo~", Ota was transferred to newly formed Team KIV and appointed captain.On 17 January 2017, Ota announced her graduation from HKT48 and HKT48 held a concert entitled "HKT48 Spring Kanto Tour 2017 ~We will show you true idols~ (HKT48 春の関東ツアー2017 ～本気のアイドルを見せてやる～)".On November 20, 2023, Ota announced her marriage to Chiba Lotte Marines baseball player Koki Yamaguchi.