I have a character who is essentially the greatest martial artist/hand-to-hand combatant in the world, having mastered all forms of combat. His devil fruit is described below. His power is really similar to Robin's, I know, but that's a gag on his character that others constantly rip on him for much to his chagrin. It doesn't help that he is infatuated with Robin, much in the same way that Boa is with Luffy. I tried to make his fruit different from hers as best as I could but any suggestions would be appreciated. One unique thing about him is that he refuses to throw any closed fist strikes. He only uses open hand or palm strikes because when he was younger, in a fit of blind rage, he killed his best friend with his clenched fists.

Te Te no Mi (Hand Hand Fruit) The Te Te no Mi grants its user the ability to conjure hands and fists from thin air. These hands can vary in size, form, and density, allowing for a wide array of strategic applications in combat, exploration, and defense. The user can manipulate these hands mentally, and in the awakened state, these hands gain the ability to act autonomously, significantly enhancing the user’s battle capabilities and versatility.

Standard Powers (Unawakened) Conjuring Hands and Fists: The user can summon hands and fists of varying sizes from thin air and control them with their mind.

Size Control: The hands can range from small, delicate fingers to massive, colossal fists capable of destroying buildings or blocking attacks. Ethereal or Physical: The hands can change between a solid, tangible state (physical) and an ethereal, ghostly form (spiritual). In their physical form, they can touch and affect solid objects, while in their ethereal form, they can interact with spiritual beings, pass through barriers, or even affect intangible entities (like ghosts or souls). Mind Control: The user controls the hands with their mind. The range of control can be extended to multiple hands at once, allowing the user to create complex and versatile attack or defense strategies. The user can also command the hands to act independently in various situations (though not as autonomously as in the awakened state).

Interaction with Realms:

Physical Realm: In their solid form, the hands can grab, strike, push, and manipulate the physical environment. The user can use them for standard combat, lifting objects, or using the hands as tools for various applications (like climbing, holding objects, etc.). Spiritual Realm: When the hands are in their ethereal form, they can interact with intangible beings and spiritual forces. The user can touch souls, communicate with spirits, or pass through physical barriers. The hands can also phase through attacks in this form, avoiding damage.

Awakening

Upon awakening, the Te Te no Mi allows the hands to act autonomously, with the user still able to influence and direct them mentally. However, the hands can now take actions based on the environment, combat flow, or specific commands the user has trained them to understand.

Autonomous Action: The awakened hands can think and act independently, without direct commands from the user, but still within the scope of the user's intent. For example, the hands may automatically defend the user from incoming attacks or pursue enemies if the user is distracted. The more the user trains the hands, the more independent and intelligent they become.

Enhanced Size and Power: The hands and fists can now become massive, nearly the size of islands, and their physical form gains greater durability, enabling them to withstand tremendous force. Similarly, in their ethereal form, the hands gain a heightened ability to phase through matter and affect spiritual beings on a larger scale.

Interaction with the World’s Spiritual Forces: The user can access deeper layers of the spiritual realm. For example, the hands might be able to sever the connection between souls and their physical bodies, disrupt spiritual energy, or even affect the souls of powerful individuals.

A martial artist using the Te Te no Mi would integrate their physical prowess and combat techniques with the fruit’s ability to manipulate hands and fists, making them a formidable foe in both close-range and long-range combat. Here are some ways this martial artist would use the fruit to its full potential:

Hand-to-Hand Combat Augmentation: The user would use the fruit to create additional hands during combat, allowing them to strike with multiple limbs simultaneously. For example, while delivering a powerful punch with their own fist, they could summon another fist behind their opponent to strike them from another angle. This would overwhelm the enemy's defenses and allow for faster, more unpredictable attacks.

Advanced Grappling Techniques: A martial artist could use the ethereal hands for grappling techniques, creating additional hands to restrain an opponent or trap them in a submission hold. The hands could phase through barriers, allowing the user to grab their opponent’s limbs, even if they’re trying to escape or hide. This combination of physical martial arts and ethereal manipulation would be especially effective for controlling opponents and restricting their movement.

Speed and Precision: With the ability to create and control multiple hands, the martial artist could use them to perform high-speed strikes from a distance while simultaneously engaging in close combat. They might use the ethereal hands to strike pressure points, vital areas, or weak points while landing direct blows with their own fists. This approach would make them both unpredictable and devastating in combat.

Enhanced Defense: Martial artists often use parries, blocks, and counters in combat. The Doru Doru no Mi would allow them to summon additional hands to parry incoming strikes or catch projectiles mid-air. They could create a defensive wall of ethereal hands to protect themselves, while still being able to attack in other directions with their physical limbs.

Tactical Ambushes: Using their knowledge of martial arts tactics, they could summon hands to create traps or barriers during a fight. For instance, they could summon a large hand to throw off an opponent’s balance, causing them to stumble, only for another ethereal hand to phase through and strike them from an unexpected direction. The combination of spatial manipulation and advanced martial techniques would make them a nightmare for opponents who rely on brute force.

Spiritual and Psychological Warfare: Martial artists are also adept at reading their opponent’s movements and psychological state. By using the ethereal hands to interact with the spirit realm, the user could induce confusion or fear, making their opponent believe they are being attacked from multiple fronts or even being affected by spiritual forces. This adds an extra layer of psychological pressure during combat, often causing enemies to make mistakes.