In Chapter 908 we see Jewelry Bonney infiltrates alone the Reverie by posing as “Connie”, the queen dowager of the Sorbet Kingdom.
While Jewelry Bonney infiltrates the World Nobles’ domain, she discovers Bartholomew Kuma being used as Rosward’s slave.
His son Charlos notices with excitement that his father got to rent the the Shichibukai and former king of the Sorbet Kingdom Bartholomew Kuma as his slave steed. Rosward demonstrates how he can do whatever he likes to Kuma without the Shichibukai ever weakening, and a short distance away, Connie is shocked to see Kuma already as she transforms into her real self, Jewelry Bonney.
Bonney sheds a tear for Kuma, calling the World Nobles’ treatment of him unforgivable. Meanwhile, the infiltrating Revolutionaries have seen this as well and they plan to rescue Kuma.