Uta Aihara is a Japanese voice actress affiliated with the talent agency 81 Produce. Her birth date is December 25, and she is from Chiba Prefecture. Her listed hobbies and special skills include cooking, reading, driving, traveling, dance, fashion, makeup, video editing, singing, and writing.

Aihara's most prominently documented voice role to date is Sawaki-san in the Studio Trigger web anime series The Lenticulars. The series, directed and largely solo-animated by Akira Amemiya, began streaming its short-form episodes in late 2025. In this production, she voices the character Sawaki-san alongside a cast that includes Manato Ōkawara, Yū Nishizawa, and Keigo Moriura.

Beyond this role, her other performance credits include a theatrical appearance in KING OF PRISM -dramatic PRISM.1-, a role in the video game Inazuma Eleven: Victory Road, and work in audiobooks such as Sand no Umi no Reimei and Iflus.