Mari Takahashi is a Japanese voice actress, idol, and entertainer. She was born on December 15, 1994, in Sendai, Miyagi Prefecture, Japan. Her career in the entertainment industry began at a young age, when she joined a local talent agency in Sendai in 2006. She was a member of the music group Dorothy Little Happy from 2010 until her graduation from the group in December 2018. Takahashi also performed as a member of the idol unit Kleissis, which was formed for the video game project Arca Last.

Takahashi made her debut as a voice actress in 2017, lending her voice to the character Homura Aso in the multimedia project Onsen Musume. That same year, she voiced the character Scarlett in the game Knight's Chronicle. In 2018, she appeared in the television anime 25-sai no Joshikousei, playing a student, and voiced lemoren in Ice Cream Kitarou. Her other anime roles include a part in BanG Dream! and Technoroid Overmind. She is also credited for the role of Ichigonyan in the 2019 anime Gifu no Tatekayoko. In video games, she has voiced characters such as Magoto Asagi in Arca Last, Lulu in Brown Dust, and John Everett Millais in Art Code Summoner.

As announced in July 2024, Takahashi is part of the cast for the anime series Loner Life in Another World, where she plays the role of Vice Rep C. This information confirms the role provided in the user's query. Beyond her voice work, Takahashi has performed on stage in productions such as D.C. III and the reading performance Satorare. She has also hosted a radio program called Takamari! on Nippon Cultural Broadcasting. Initially affiliated with the agency Object, Takahashi became a freelance voice actor in March 2022 when Object closed its voice actor management division, and she subsequently joined S Inc. in May 2022.