Seira Ryū is a Chinese-born voice actor active in the Japanese anime industry. She was born on November 25, 1985. Her real name is Liu Jingluo. From a young age, she aspired to become an anime voice actor, a dream inspired by her admiration for the voice acting in series such as Fullmetal Alchemist. During her high school years, she participated in the creation of doujin games and original drama CDs, and was active as an utaite (a singer on video-sharing sites) under the name kkryu.

To pursue her goal, she studied the Japanese language at Beijing Foreign Studies University, where she graduated in 2008 after spending ten months as an exchange student in Aichi, Japan. Following her graduation, she moved to Japan to attend the Nippon Engineering College for two years of specialized voice actor training. Her professional debut was in the 2011 joint Chinese-Japanese animated film The Tibetan Dog, for which she provided the voice for the protagonist, Tianjin. Later that year, she became a junior member of the talent agency Aoni Production.

Ryū is noted for being a bilingual voice actor, fluent in both Chinese and Japanese, a skill she frequently utilizes in her work. This has led to her being cast in many roles for Chinese characters in Japanese anime and for Chinese-Japanese co-productions. Her first role in a Japanese television anime series was a small part in Blast of Tempest in 2012. Among her early television roles was Chinatsu in the 2014 series Medamayaki no Kimi Itsu Tsubusu?. A significant role in the same year was Shingo Tsukino, the younger brother of the protagonist, in Pretty Guardian Sailor Moon Crystal. In 2018, she voiced the character Tōichi Tōin in the series To Be Heroine. Her work in video games includes providing the voice for the character Meitenkun in the long-running fighting game series The King of Fighters, starting with The King of Fighters XIV in 2016. She also voiced Wu-Ruixiang in Samurai Shodown in 2019.

Beyond acting, Ryū has contributed to the voice synthesis software world by providing the voice source for the Chinese VOCALOID3 library, YANHE. In 2018, she authored and illustrated a autobiographical manga titled Teach Me, Ryu-sensei! The Daily Life of a Bilingual Voice Actor, which details her experiences pursuing a voice acting career in Japan.