Kanato Watai is a Japanese voice actor affiliated with the talent agency Axel-One as a junior member. He was born on February 18 and hails from Tochigi Prefecture, Japan. He previously performed under the stage name Kanato Watarai, using the same kanji characters for his given and family name.

His career in animation includes a range of supporting and episodic roles. In 2023, he voiced the character Kiris in the series The Giant Beasts of Ars. Other notable anime credits from 2022 and 2023 include roles in The Marginal Service, Spy Classroom, The Sacrificial Princess and the King of Beasts, and the long-running series Detective Conan, where he played a bank clerk. Earlier roles include a merchant in Restaurant to Another World season two, a bald-headed character in I've Been Killing Slimes for 300 Years and Maxed Out My Level, and various background characters such as guards, private soldiers, adventurers, and passersby in shows like Rust-Eater Bisco and Platinum End. He also appeared in the Kira Kira Pretty Cure A La Mode franchise. In video games, his work includes roles in the D.C. series, such as D.C.4 Da Capo 4. He has taken on minor roles in popular franchises like Yu-Gi-Oh Go Rush and The iDOLM@STER franchise under its Shiny Colors sub-brand.

Recurring collaborations with specific studios, directors, or other voice actors are not prominently documented in his publicly available filmography. His voice acting achievements consist primarily of consistent work in supporting and guest roles across numerous anime titles since his debut around 2017, rather than a single leading or breakout part. The Thief 3 role in the series Castlevania mentioned in the user query is not confirmed or detailed in the available records.