Bayonetto Bayonetto no Mi

The Bayonetto Bayonetto no Mi (バヨネット銃剣フルーツ or Sword Sword Fruit) is a fruit that allows the user to materialize and control the blades of swords, much like the Bloom Bloom Fruit can materialize and control limbs.

Uses
The uses for this fruit are mainly attack based. A common use for it is to protrude them from the wrist much like assassin knives and swing them like that. However, there are obviously many more uses than that. It can be used as porcupine-like armor as we as to cover a shield to perform painful bashes. Along with that, it can be used to clutter a ship to pierce everyone on it.

Current Eater
The current eater is Gesu Yarō, the main antagonist of Tales of the Dark Dark Sea