is one piece episode 651 filler?

As Rebecca lies on the ground sobbing, a bewildered Luffy asks about her sudden breakdown. She then explains to him that her friend, the one-legged soldier Luffy met outside the Colosseum, will soon die.

A perplexed Luffy finds such shocking news very strange, though finds that the fact that the toy is alive in the first place is even stranger. Rebecca tells him that Luffy, just as every other newcomer to Dressrosa, cannot fully understand.