Daiya is the outgoing youngest of Norisuke Higashikata IV's four children. When Josuke Higashikata is introduced to the family, she develops a crush on him. Daiya is a Stand user and can take memories away with her California King Bed. It can steal and materialize part of someone's memories if they break a rule set by the user. Introduced as an antagonist in the "California King Bed" story arc, Daiya becomes a neutral character.