Reika Uyama is a Japanese voice actress and actress born on November 5, 1994, in Kanagawa Prefecture. She is affiliated with the theatrical troupe and agency Gekidan Seinenza. Uyama has been active in the voice acting industry since the early 2010s, balancing her career while pursuing studies in Japanese literature at Kokugakuin University. Standing 148 centimeters tall, she has provided voices for a wide array of anime series, animated films, and video game localizations.

Uyama made her debut in the voice acting field in 2011 with a role in the series Cooking Idol I My Mie. She gained further recognition in 2014 when she voiced Birk, one of the young protagonists in the anime adaptation of Ronja the Robber's Daughter. In 2016, she took on the role of Chihiro Sakai in the sports comedy series Cheer Boys!!, which follows a group of male college students forming a cheerleading squad. One of her notable roles followed in 2017 when she voiced Kemal in the historical fantasy series Altair: A Record of Battles, a story centered on a young strategist navigating political intrigue and warfare. That same year, she appeared in supporting roles in acclaimed series such as Natsume's Book of Friends (as Mana) and the animated film Lu Over the Wall.

Her performance credits also extend to a variety of other anime from the mid-2010s, including roles in Seraph of the End, Aquarion Logos, The Lost Village, The Asterisk War, and Rage of Bahamut: Virgin Soul. Beyond television anime, Uyama has contributed to the Japanese dubs of major Western video game titles, providing voices for characters in interactive dramas such as Detroit: Become Human and The Last of Us Part II. Her qualifications include certifications in Japanese language proficiency and word processing, reflecting a strong command of her native language.