Mizuumi Ramune

 (水海らむね) is a member of no concept and former member of Oka no Kiseki and Niconico♡STREET.

She was a founding member of Oka no Kiseki and graduated in April 2020. Simultaneously, she joined Niconico♡STREET in July 2018 and graduated in September 2018. She is a founding member of no concept.