Pudding will definitely be back because her story with Sanji remains unfinished, and this is because she removed and saved portions of his memories with her Devil Fruit.

Is Sanji gonna marry pudding?

A man proposes to Baby 5. ... Sanji also proposed marriage to Charlotte Pudding, although they were already arranged to be married and he only did it in order to put himself at peace with this path.

What happened to Sanji and pudding?

The spoilers for the chapter reveal that when Pudding and Sanji said their goodbyes that "Pudding actually kissed Sanji when she left him." Fans had suspected this was the case when Pudding asked him for a favor and failed to follow through, but this is now confirm that she did kiss Sanji.