Rinku is an outgoing character and the catalyst for beginning the D4DJ series. She is known for being loud, silly, and for her signature move. When she is happy, she spins in a circle and yells 'Happy Around!' which is where the name for her DJ unit comes from. She likes shells, and will hand them out to new friends she makes. She also likes bugs. She is a little bit airheaded, and she can be seen as somewhat of an oddball.
Rinku grew up in Japan near Yoba Academy, but moved to Tiotio, Africa when she was young because of her parents jobs. Her father is a zoologist, and her mother is an entomologist. In the first episode of First Mix, she learns about the lively world of DJing at Yoba Academy.
Aimoto has reddish brown eyes and shoulder length yellow/blonde hair, with a section put into an braided crown. She wears a red bow on the right side of her head.
She has a pet chameleon named Leon.