Otsuki Riko (大槻りこ) is a Japanese idol, a former member of Eisei to Karatea, and a former member of PiiiiiiiN.
She joined PiiiiiiiN in August 2019, and graduated on August 8, 2020, where the group disbanded.
She was first revealed as a member of Eisei To Karatea on June 23, 2021, although the group was founded on June 17, 2021.
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- She was a Miss Magazine 2020 Best 16 winner.