Yuuka Nanri is a Japanese actress, voice actress, and singer born on March 13, 1984, in Nagasaki Prefecture. She is affiliated with the talent agency Space Craft Entertainment. Her career in entertainment began in childhood; she debuted on an NHK educational program in 1995 and joined the Minami Aoyama Shōjo Kagekidan theater troupe in 1997. After leaving the troupe in 2001, she made her voice acting debut as Bubbles in the Japanese dub of The Powerpuff Girls.

Nanri's voice acting career encompasses a wide range of roles. She gained early recognition for her role as Henrietta in the 2003 series Gunslinger Girl. Other notable anime roles include Nao Yūki in My-HiME, Karen Ichijō in School Rumble, Mao Nome in Macross Zero, Sayuri Sawatari in the film The Place Promised in Our Early Days, Ritsuko Mukae in Kids on the Slope, Saori Chiba in Wandering Son, Nami Shishidō in The Girl Who Leapt Through Space, Erika Takakura in Lagrange: The Flower of Rin-ne, Liz T. Blood in Blood Lad, Ratten in Problem Children Are Coming from Another World, Aren't They?, and Miyuki MacKenzie in If Her Flag Breaks. Her work also includes roles in video games and original video animations.

In addition to her voice acting, Nanri is highly accomplished as a singer. She is prominently known for her collaboration with composer Yuki Kajiura. In 2003, she became the vocalist for the musical unit FictionJunction YUUKA, performing theme songs and insert songs for numerous anime series. Their song Akatsuki no Kuruma, used in Mobile Suit Gundam SEED, became a major hit, reaching number ten on the Oricon weekly singles chart. The single Honō no Tobira, from Mobile Suit Gundam SEED Destiny, made history in 2005 as the first single by a voice actor to top the Oricon daily rankings.

From 2003 to 2005, Nanri was also part of the voice-acting musical duo tiaraway with fellow voice actress and singer Saeko Chiba. She has also released music as a solo artist, including the mini-album LIVE ON! in 2012. Her contributions to anime music and voice acting have made her a notable figure in the industry.