Shakky's debut outfit had giraffe-print pants, and Whitebeard had simped for her in the past. Though I think those two things are unrelated.
Anyway, the giraffe print is interesting when you consider that she's Rayleigh's wife. His new-gen parallel, Zoro, has defeated the giraffe Zoan user Kaku and might face the kirin Zoan user Killingham in the current arc.
In Japanese culture, kirins are associated with giraffes since the word for them is interchangeable. The Devil Fruit user of the giraffe Zoan is called a "Kirin Ningen" (giraffe man). So, there might be a subtle giraffe theme connecting Shakky, Rayleigh, and Zoro.