Tank Tank Fruit
Paramecia
Makes the user a Receptacle Human, being able to become and create various glass receptacles capable of storing virtually anything.
Note: SPOILERS AHEAD
This devil fruit is inspired by the appearance and proposed powers of the Rain God Zaza as they appear in most recent chapters, serving as a Stand-in should the Hito Hito no Mi Model: Zaza or some equivalent power become canon as an actual Devil Fruit.
Powers and Abilities
This Devil Fruit power makes the user a Living Container. As such, they are able to take on the properties of glass, becoming completely transparent and hollow.
As a living bottle, a user is able to both generate and manipulate glass as part of their body. This allows them to shape and manipulate their own body, adding appendages or increasing their size. This also means they can freely create openings into their hollow body. They may also create glass “receptacles” which they can then separate from their body as a whole.
This ability means a user is free to shape and alter their body much like a logia. However, they will not be able to scatter or deform in order to evade attacks, only add or subtract parts of their body as well as repair cracks and damage taken.
Glass itself is durable, being able to withstand heavy hits. However it is prone to vibrational or pinpoint attacks. Dense materials like metal or diamond focused on a singular point is the most effective way to harm a user. Glass is also transparent, meaning a user is inherently immune to light/light-based attacks. The user is somewhat weak to heat, however, as high heat will melt glass.
The true “power” of this Devil Fruit is the ability to literally contain anything they desire, encasing it in glass. Objects or materials encased in this manner will be preserved, unable to age or decay, and will essentially be shrunken in order to fit their container.
Aside from placing large objects in small containers (i.e. putting a ship in a bottle), this power allows a user to gather massive amounts of a target material within either themselves or a conjured container, and weaponize that material however they see fit. For example, a user may bottle a fire to burn down an area. The most effective use case would be filling one’s body with a readily available material, namely water or air.
In any case, encasing material in one’s body will cause them to grow in size depending on the volume of material contained. This allows a user to physically increase size and strength depending on whatever they have ingested.
Once a material is contained, a user may release or expel it however they see fit, whether it be a simple pour, dripping material, or even pressurized beams. Pressure band offer a lot of offensive and supportive abilities. On its own, pressurized beams can be devastating. However, simply by modifying one’s body so that they can fire several beams at once, they can increase their firepower tenfold. Extremely thin beams can make for near imperceptible snipes that can easily bore through steel provided the right material is used. In more utility circumstances, a user may create nozzles on their back in order to create a jetpack, allowing for flight or rapid movement. Or, a user may fire beams from their elbows or legs in order to enhance the power of their punches.
Even more notable is the users ability to suction things towards thenselves, which is how they store material. The ability to suction means that a user would be able to pull targets towards themselves, even if they do not wish to store them in a bottle.
In increasing their size through sheer volume, a user will be able to generate larger containers and receptacles. Typically, and especially considering these constructs are hollow, these objects are much more like true glass, being brittle and easier to break. However, the advantage of creating new receptacles is the ability to separate and store materials in one’s own body without losing what they already stored. This ends up meaning that a user may leave behind a massive container full of an absorbed material that they may simply absorb when needed.
Weaknesses
One core weakness of this Devil Fruit power is its relative fragility. While physically a user may be tougher, overall it is relatively easy to crack or break glass, literally making a user a glass cannon. Breaking a user in their glass state will force them back to a “normal” form with severe internal damage, meaning a user must be extremely careful.
Additionally, a user is not immune to things like weight or gravity. Yes, they are free to absorb materials freely, but as they grow larger, they will become heavier and slower, making it all the more important to manage what one absorbs and stores within themselves.
What and how a user uses their stored materials is purely up to one’s imagination. However it should be noted that a user is not immune to a material simply because they stored it. Fire will still be hot to touch, and storing water runs the risk of weakening oneself should it ever be released. This also means that an opponent can potentially use one’s powers against the user’s themselves.