Mari Koizumi (小泉まり), born December 5, 1992, in Tokyo, Japan, is a Japanese AV actress known for her dynamic career. With a height of 159 cm and measurements 87-60-93 cm (E65 cup), blood type A, she debuted on March 3, 2015, via the Prestige label's 'AV New Generation Discovery' series, portrayed as a third-year women's basketball player from a renowned sports university. She quickly rose with releases like the AV OPEN-winning 'Nakadashi Gakkyu Hoakai.'
Retiring in mid-August 2016, she returned in September as Asumi Kou (明海こう) under Minds agency, often in supporting roles. After another brief retirement end-2017, she resumed. In April 2020, renamed Momona Ako (桃菜あこ), joining Life Promotion.
Since February 2021, active as cosplayer Rennyu-chan (練乳ちゃん). Aliases: Fujiki Mika, Mochizuki Yuna. She has appeared in numerous DVDs up to 2022, showcasing versatility in adult entertainment.