Name: Jax "Cosmo" Harlock

Devil Fruit: The Cosmo Cosmo no Mi, a Paramecia-type Devil Fruit.

Power: Grants the user complete control over the gravitational forces and other planetary phenomena of various celestial bodies. The user can manipulate these forces for both offensive and defensive purposes, drawing power from the specific characteristics of each planet.

Attacks:

• Pluto's Gravitational Crush (Pluto): The user channels Pluto's immense gravitational pull, creating a localized area of extreme gravity that crushes opponents. The intensity can be adjusted, ranging from a debilitating weight to an instantaneous pulverization.

• Martian Sandstorm (Mars): The user manipulates Martian dust storms, creating powerful, abrasive sandstorms that can blind, suffocate, and inflict severe physical damage. The user can control the size, speed, and intensity of the storm.

• Jupiter's Maelstrom (Jupiter): The user summons a miniature version of Jupiter's Great Red Spot, a swirling vortex of immense power that sucks in and crushes opponents with incredible force. The vortex can be controlled in size and speed.

• Venus's Inferno (Venus): The user generates intense heat and pressure, mimicking the scorching surface of Venus. This attack can create localized firestorms and melt through almost any material.

• Mercurial Quicksilver (Mercury): The user manipulates the liquid metal of Mercury, creating razor-sharp projectiles that move at incredible speeds. These projectiles can be controlled with pinpoint accuracy.

• Saturn's Ring Assault (Saturn): The user controls the icy rings of Saturn, launching massive chunks of ice and rock at incredible speeds. The user can also create a swirling ring of ice that traps and damages opponents.

• Uranian Ice Age (Uranus): The user generates intense cold, mimicking the frigid temperatures of Uranus. This attack can freeze opponents solid or create powerful ice blasts.

• Neptunian Tidal Wave (Neptune): The user manipulates the immense water pressure of Neptune's oceans, creating powerful tidal waves that crash down on opponents. The size and force of the wave can be controlled.

• Solar Flare (Sun): The user channels the Sun's energy, unleashing a powerful blast of solar radiation that incinerates opponents. This is the user's most powerful attack, but it requires significant energy and has a longer recharge time.

Weaknesses:

• Distance: The effectiveness of the powers diminishes with distance from the targeted planet's influence. The Sun's power is an exception, but it requires significant energy expenditure.

• Energy Consumption: Using the more powerful planetary attacks requires significant energy, leading to exhaustion if overused.

• Standard Devil Fruit Weaknesses: Jax is vulnerable to the standard weaknesses of Devil Fruit users (sea-stone, water).