Daiya is Norisuke Higashikata's youngest daughter. She is near-blind, and is an avid fan of progressive rock (in particular, Yes). She is extremely possessive of Josuke, and appears to be jealous of Yasuho for getting close to him.

When she was a child, she fell into a fault near the wall-eyes and gained a stand, California King Bed, which can steal people's memories and turn them into chess pieces. A memory can be stolen when a person lies to Daiya or tries to fool her. However, stolen memories return if she steps on that person's shadow.