Eri Hocari belongs to the Hocari family and holds an executive position within the Bottleman Association (BMA). She is married to Io Hocari and is the mother of Ryo Hocari. Her illness during Ryo's childhood significantly disrupted family dynamics, fueling Ryo's growing resentment toward his father Io. This period of illness coincided with Io's increasingly strict training regimen for Ryo, creating a pivotal moment in the family's history that intensified Ryo's bitterness and rebellion. Her health condition indirectly shaped Ryo's initial negative attitude toward Bottleman battles and his relationships, including his perception of Aquasports DX solely as a tool.