Yumiri Hanamori is a Japanese voice actress born on September 29, 1997, in Kanagawa Prefecture. She is affiliated with the talent agency tomorrow jam, which she established in January 2023 after previously being represented by Swallow and m&i. She stands 157 cm tall and has blood type O.

Her interest in voice acting began during her second year of middle school, encouraged by friends, and she made her debut after receiving a judges' encouragement award in the second Pony Canyon Voice Tama audition. Her first major film role came in 2016 with the animated movie Glass no Hana to Kowasu Sekai, where she also played her first leading role. In the same year, she won the Best Comedy Radio Award at the second Anime Radio Awards for her work on the radio program for the anime Etotama.

In late 2019, she announced she was stepping back from stage performances and graduating from the Re:Stage! franchise due to health issues involving patellar subluxation and meniscus damage in her knees.

Hanamori is recognized for her versatile voice, capable of portraying both天真浪漫 and composed, stoic characters, as well as young boy roles. She gained significant popularity through her performance as Nadeshiko Kagamihara in the Laid-Back Camp series, a role that became one of her signature characters. Her natural speaking voice is noted to be closer to that of Ai Hayasaka from Kaguya-sama: Love is War.

Her extensive list of major anime roles includes Ai Hayasaka in Kaguya-sama: Love is War, Zero in The Dawn of the Witch (from the same setting as The Dawn of the Witch), Shizu in That Time I Got Reincarnated as a Slime, Evileye in Overlord II and IV, Popuko in Pop Team Epic, Sango Suzumura / Cure Coral in Tropical-Rouge! Precure, Aoi Torino in Healer Girl, Kyosuke Yotsuya in Mieruko-chan, Sorawo Kamikoshi in Otherside Picnic, Rin Vispose in Our Last Crusade or the Rise of a New World, and Shin Sato in The Idolm@ster Cinderella Girls franchise. In video games, she voices Takanashi Hoshino in Blue Archive, Ifrit in Arknights, Nemo in Fate/Grand Order, and Mercedes von Martritz in Fire Emblem: Three Houses.

She has frequently collaborated with voice actress Aoi Yūki and maintains a close friendship with fellow voice actress Ari Ozawa. She has expressed deep admiration for veteran voice actress Junko Takeuchi. Her hobbies include reading, singing, drawing, and playing games, and her special skills are tennis and table tennis. Her surname is a stage name, while her given name is written in kanji in her real name.