Nami Miyahara is a Japanese voice actress and singer born on January 24, 1978, in Tokyo, Japan. She is affiliated with the talent agency Atomic Monkey. Her career in entertainment began in childhood when she joined the theatrical troupe Gekidan Himawari as a first-grade elementary school student. She later attended an American school in Japan and, during her junior high school years, moved with her family to Austria, where she studied at an international school in Salzburg. This international upbringing made her a multilingual speaker fluent in Japanese, English, and German. She officially debuted as a voice actress in 1997.

A defining characteristic of Miyahara's voice acting career is her frequent casting in roles that require the use of foreign languages, a direct result of her linguistic abilities. She is known for her husky voice, which allows her to effectively portray both young boy and girl characters. She has a long-standing association with Toei Animation, appearing in numerous productions from the studio, and has also frequently collaborated with director Yashuhiro Yamauchi.

Miyahara's most iconic and enduring role is that of Momoko Asuka in the beloved Ojamajo Doremi (Magical DoReMi) franchise. She first voiced the character, a returnee from the United States, in the 2001 series Mo~tto! Ojamajo Doremi and continued in subsequent installments including Ojamajo Doremi Dokka~n!. Her authentic English pronunciation for the character was highly praised. She reprised the role nearly two decades later in the 2020 live-action film Looking for Magical Doremi. In the same franchise, she also voiced the recurring role of Masaru Yada and the fairy Nini. Her other major anime roles include Miyako Goutokuji, one of the superheroines known as Rolling Bubbles, in Demashitaa! Powerpuff Girls Z, Popo in Kouchuu Ouja Mushiking ~Mori no Tami no Densetsu~, Utasha in Umi Monogatari ~Anata ga Ite Kureta Koto~, and Jurika Jinno in Magic User's Club!. She also provided the voice for Wallace in the Digimon Adventure 02 film, Aisha Aldola in So Ra No Wo To, for which she performed all her lines in German, Lyuze in Casshern Sins, Yuuya Kogure in the Inazuma Eleven series, and Akari Tsukumo in Yu-Gi-Oh! ZEXAL.

Beyond voice acting, Miyahara is also an active singer and lyricist. She began her musical career around the same time as her voice acting debut and has used her English proficiency to write her own lyrics. She released her first independent extended play, titled Reason, in 2003 under the Dream Records label. Her musical work extends to providing vocals for the electronic music project Genki Rockets, contributing to the image of the fictional space girl character Lumi. She has also been a featured artist on albums by musicians such as FreeTEMPO. In addition to her work in anime and music, Miyahara has lent her voice to foreign language dubbing for live-action and animated series, and has worked as a narrator for television programs, commercials, and major events like the Tokyo Girls Collection.