Kurumi Mamiya (間宮 くるみ, Mamiya Kurumi; born November 10) is a Japanese voice actress affiliated with 81 Produce. She is most famously known for her role as the titular character of the Trotting Hamtaro television anime series. Other notable voice roles of hers are as U-tan in Inai Inai Baa! and Leo in One Piece.
Source: “Kurumi Mamiya”, English Wikipedia (CC BY-SA 4.0), excerpt