Yuki Kaida is a Japanese voice actress and radio personality from Tokyo, Japan. Born on November 30, she began her career in 1993 and has since become recognized for a versatile vocal range that allows her to portray a wide variety of characters, from young boys to adult women. She is particularly known for her frequent roles as young male characters.

Before beginning her voice acting career, Kaida pursued a different artistic path. After graduating from high school in Tokyo's Shinjuku ward, she moved to the United States to study at the International University of Art and Music in San Diego, California. She spent four years there, majoring in musical theater. This background in musical performance contributed to her later skills as a voice actor. Following her studies, she returned to Japan to focus on voice acting, making her debut in the OVA Southern Wind as the character Himiko.

Kaida's first major and career-defining role came in 1999 when she was cast as Kurapika in the anime adaptation of Hunter × Hunter. The popularity of the series significantly raised her profile. She solidified her status as a leading voice actor for young male characters with her role as the gentle and talented Shusuke Fuji in The Prince of Tennis, which began airing in 2001. She has continued to voice this character in numerous sequels and OVAs, including The Prince of Tennis II: U-17 World Cup. Another notable lead role in this vein was as Abe no Masahiro in Shōnen Onmyōji.

In addition to these more serious roles, Kaida has demonstrated a talent for comedy and a wide vocal range. She voiced the title character in the comedic Patalliro Saiyuki! and portrayed the androgynous Homura in Sekirei. She is also well-known to fans for her long-running role as the character China in the popular and long-running Hetalia franchise, appearing in Hetalia: Axis Powers, Hetalia: World Series, Hetalia: The Beautiful World, and Hetalia: World Stars, among others. She often serves as the narrator for these series as well.

Kaida's filmography includes a broad range of other significant roles across various genres. She played the determined Taro Hanaukyo in Hanaukyo Maid-tai, the skilled strategist Echidna in the Queen's Blade series, and Alexandra Garcia in Kuroko's Basketball. In children's and magical girl anime, she voiced Peridot in the Jewelpet franchise and the characters Lock and Kuroro in Go! Princess Precure. More recently, she has taken on the role of the enigmatic Doctor in the anime adaptation of the popular game Arknights, appearing in Arknights: Prelude to Dawn, Arknights: Perish in Frost, and the announced Arknights: Rise from Ember. She also voiced Commissioner O in The God of High School and Lydia Beginsgate in The Greatest Demon Lord is Reborn as a Typical Nobody.

Beyond her work in anime, Kaida is also an active radio personality and has served as an announcer for a radio show. Her fluency in English, a result of her education in the United States, is notable and she has occasionally been cast in English-speaking roles, such as Angela Burton in Genshiken. She is also known to have competence in French and Chinese. She is a member of the voice acting unit AZU alongside Junko Takeuchi and Junko Minagawa, and the unit Takada Hiroyuki with Hiroki Takahashi. Initially affiliated with the agency Toritori Office, she is currently freelance.