Idk if anyone noticed but when Higurashi gave Orochi his devil fruit in episode 965 she showed her own powers to Orochi that power was of the Swipe Swipe fruit which allows you to shift to another persons face and body (current owner bon clay) during her power show she displayed 3 faces one of Orochi one of a random women and third of a person very similar to the Golden lion Shiki !
Idk if its true or not but they are very similar if its true then is it possible that they were close and Higurashi was a member of Rocks Xebecs crew! cuz she had to be close to him to be able to touch his face and obtain the power to be able to transform into his face!
Please go and see!