Izumi Saegusa

As the younger half of the Saegusa twins and Mayumi’s little sister, this character possesses a much more feminine personality than her twin, Kasumi. While she holds deep admiration and respect for both Shiba siblings, she maintains a competitive spirit through her ongoing rivalry with Ayako. Her delicate demeanor provides a striking contrast to her sister's nature, adding unique depth to the family's complex interpersonal dynamics.