Rosy (ビューティー, Byūtii/Beauty) is one of the Rainbow Girls, along with Daisy and Ivy, who serve under Prince Bo and would do anything for him. She appears in the Hamtaro Ham-Ham Games GBA game on Team Rainbow.
Her Japanese name comes from the English word "Beauty" while her English name, Rosy, comes from the rose flower because her suit and hair color is red.
She is a lazy hamster with a warm heart. She admired how the Ham-Hams saved the pirates' ship that was going to fall in the sea. She is always in her best act when Bo is around.