In the manga, Odille Fosset took Hinaichigo from Jun Sakurada when she revealed a ring that appeared to be from Hinaichigo. Although Jun assures Hinaichigo that she could stay with whomever she wishes, she unconsciously decides to go with Odille. It is later revealed that Odille is the granddaughter of Corinne, Hinaichigo's previous owner.
Cute cosplay! I love the frills on her costume, and she has a ring too! Thanks to Galimar for sending this in!