is one piece episode 620 filler?

After Baby 5's attack, Franky Shogun is seen lying on the deck surrounded by flames. Baby 5 reforms through her ability after her Missile Girl attack.

Buffalo asks if she needs some weapons he picked up, although comments how she is already a weapon herself. Baby 5 says that they are blessed but the weapons were bought because she felt "needed", due to her personality.

Franky Shogun punches her from behind but she jumps out of the way and transforms into a revolver. Frank takes the full blast but laughs it off, condescendingly saying that it would not work.