Ritsuko is a snobby rich girl from one of Japan's wealthiest families. Her father is the founder and CEO of Chikanari Heavy Industries, which is known for supplying Saikou Corp with many of the materials needed for their electronic products.

"Ara Ara, Ohayo, Ryoba-chan! Look at you, darling! Just shining and stunning as ever!" She complimented her crush, Ryoba Aishi, ritsuko likes flirting with Ryoba.