Shunsei Ota is a Japanese actor, entertainer, and voice actor known for his work in both live-action television and anime. He was born on November 6, 1999, and is a member of the Japanese pop group OCTPATH. His career includes participation as a contestant on the reality competition series Produce 101 Japan Season 2, alongside roles in several Japanese television dramas such as Time Traveler's Disease, The Revenge Lover, and 102nd Marriage Proposal.

In the field of anime voice acting, Ota is recognized for his role in the 2025 animated film ChaO, produced by Studio 4°C. In this romantic comedy fantasy film, he voices the character Juno, a young and determined beat reporter. Juno is depicted as a hardworking novice who admires a character from his favorite book and works tirelessly to uncover the story of the relationship between humans and mermaids, despite frequently facing the disapproval of his editor-in-chief. Regarding the role, Ota has described Juno as a charming character who diligently pursues her passion and has encouraged audiences to appreciate her earnest nature.