Momoko Soyama is a Japanese voice actress and actress affiliated with the talent agency Aoni Production. She was born on October 14th in Saitama Prefecture, Japan. She is a graduate of the Osaka University of Arts, where she studied in the Broadcasting Department of the Faculty of Arts and was a member of the first intake of the university's voice acting course. During her middle and high school years, she was part of her school's choir club.

Soyama's voice acting career began in the 2010s. She has built a diverse portfolio of roles across animation, video games, and dubbing. A significant part of her early work involved providing voices for numerous minor characters and ensemble casts in long-running series. She has had a longstanding association with the One Piece franchise, contributing voices for various characters including members of Big Mom's chorus, starting as early as 1999.

Her notable anime roles include Miyabi Momoyama and numerous other characters in the sixth series of GeGeGe no Kitarō in 2018. She voiced the character Ira in the 2019 television series Z/X Code reunion. Other significant roles include Yumi Koya in My Hero Academia (fourth season onwards), Sara Asaka in KiraKira☆光之美少女 A La Mode, and various characters in the Digimon franchise, such as Lalamon in Digimon Adventure: and a beautiful woman in Digimon Ghost Game. Her work also extends to video games, with roles in titles such as Kemono Friends, Goetia X, and Super Robot Wars T.

Beyond anime and games, Soyama's career encompasses voice acting for foreign language dubs, narration for television programs and news, and appearances in TV dramas. She has also hosted online programs and served as an assistant personality on radio shows. Her work is characterized by a versatile vocal range, allowing her to portray not only women but also young boys and non-human characters. She is known for her energetic presence and her hobbies include singing, watching foreign films and dramas, and doing makeup impressions of Hollywood actresses.