Keaki Watanabe is a Japanese voice actress and professional bowler with a multifaceted career in entertainment and sports. Born on August 28, 1992, in Fukuoka Prefecture and raised in Tochigi Prefecture, she began her career as a child model and actress before transitioning into voice acting. She is affiliated with the talent agency 81 Produce.

Watanabe entered the voice acting industry after winning the grand prize at the 2016 AnimeJapan Voice Actor Dream Audition, a significant achievement that launched her career in anime. One of her earliest and most prominent anime roles came the same year, when she was cast as the lead character Professor Testa Lielbelle in the original net anime Luger Code 1951. She voiced the role of Testa, a young linguistic genius and university professor tasked with deciphering a code used by werewolves.

She has since taken on a variety of roles in anime series. Watanabe is known for voicing Sophie Judson-Warfield in the franchise Bakugan: Armored Alliance, a role she reprised in subsequent installments Bakugan: Evolutions and Bakugan: Legends. Her other voice acting credits include multiple characters in the anime The Reflection, such as Allen St. Louis and a woman with healing powers, as well as an announcement role in the series Between the Sky and Sea. Beyond anime, her work extends to live-action television, where she appeared as Keiru Sanshinkan in the drama Garo and as Chao Rinshen in the live-action adaptation of Negima! Magister Negi Magi.

Parallel to her voice acting career, Watanabe is a licensed professional bowler, having passed the rigorous test for the Japan Professional Bowling Association in 2012 and earning license number 488. Her athletic career achieved a major milestone in 2019 when she secured her first official tournament victory at the Tokai Open. This combination of skills has earned her recognition in both fields, with her versatility as a performer and athlete marking a distinctive career path in the Japanese entertainment industry.