Chachakaka first appears in Chapter 13 of BlazBlue: Remix Heart alongside her partner Shiori Kirihito in the Military Academy's spa. Afterwards, she was seen sleeping in the attic instead of a regular dorm. The following day, Chachakaka stole almost all student's rosters to gather information about them for Shiori. Later she assisted Shiori in capturing Mai. In Chapter 18, she found out who Mai really is when she is ordered to kill her. Later, when Chachakaka was trying to kill Mai, she gave up after she witnessed her unbelievable skills.