Sayaka Aida, whose real name is Sayaka Kobayashi, is a Japanese voice actress and narrator born on March 9, 1975, in Tokyo, Japan. She began her career under her birth name before changing her stage name to Sayaka Aida on October 1, 1997. She is affiliated with the talent management firm Arts Vision.

Aida has built a career with a wide range of roles in anime, video games, and tokusatsu productions. In anime, she is known for her leading roles as Taiyo Ozora in Shutsugeki! Machine Robo Rescue, Byakko no Kogenta in Onmyō Taisenki, and Isaribi in Naruto. She also voiced Shiro Kabuto in the original video animations Mazinkaiser and Mazinkaiser: Shitou! Ankoku Daishogun, and Kaito Tatsuno in Dinozaurs: The Series.

A significant and recurring part of her career is her association with the.hack// multimedia franchise. She is the voice of the protagonist Kite in the original series of video games, the.hack//GIFT OVA, and reprised the role for the crossover titles Project X Zone and its sequel. Her work in video games also includes roles such as Wang Tang in the Power Stone series and Akagane in Shinobi.

Beyond anime and games, Aida has performed voice work for tokusatsu series, providing the voices for Analyse Robo Mint in Kyuukyuu Sentai GoGo-V and Bakuryuu Bachycelonagurus in Bakuryuu Sentai Abaranger. Throughout her career, she has been noted for her frequent collaborations with fellow voice actors such as斋贺光希 and坂口候一. Her career has remained active into the 2020s, with roles in series like Dark Gathering and Makeine: Too Many Losing Heroines!.