Arisa Sonohara is a Japanese voice actor and actress affiliated with the agency Space Craft Group. Born in Tokyo on August 24, 2001, she began her entertainment career as a child actor and later joined the idol group Otome Shinto in 2014. Following the group's disbandment in 2016, she transitioned to solo work, which included a long-running role as a regular on the NHK educational program Suiença from 2016 to 2023.

Sonohara's career includes significant work in both live-action and voice acting. A major early role was her first regular television part as Asahi Minato in the 2018 tokusatsu series Ultraman R/B. This performance led to her providing the voice for the character Ultraman Grigio in subsequent films and series within the Ultra franchise, marking a key entry into voice work. Her other voice acting credits include roles in mobile games such as GRAN SAGA and Food Fantasy, and the web anime Young社长R.

In 2023, Sonohara became part of the mixed-media music project Utahime Dream, launched by Earth Star Entertainment. Within this project, she voices the character Kiyomi Mashiro, one of the seven main members of the unit Utahime All Stars. The project involves performing both original and cover songs, and an anime television series adaptation has been announced. Beyond voice acting, Sonohara has expanded into solo music, releasing a digital single in 2024 and a mini-album in 2023. Her work is frequently connected to stage plays, having appeared in productions of stage adaptations for series like World Trigger and Demon Slayer.