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- Team White Snow from IGPX Immortal Grand Prix use their "Puppetmaster" attack on Team Satomi. The arms of their mechs grab onto the enemy and hack into their systems. This resulted in Team Satomi unintentionally and uncontrollably attacking each other during their first encounter with White Snow.
- Crona in Soul Eater has a sword named Ragnarok that is physically part of his/her (it's hard to tell) body (via his essence being blended with hir blood). S/he always follows its directions, and during fight scenes is seen to be being dragged around by it.
- It's pretty much shown that the "Black Blood" in general does this (and can cause a weapon to overwhelm their meister). For example, when Maka's using it and acts Ax-Crazy, her consciousness is basically observing her and finds it embarrassing and Soul has nightmares about absorbing her.
- In InuYasha, Sesshomaru takes the fangs of one of Big Bad Naraku's previous incarnations to the swordsmith Kaijinbo, and commissions him to make a sword from it. He complies, but Tokijin, the resulting sword, takes over the will of anyone trying to wield it. In a display of how powerful Sesshomaru is, when he finally grips its hilt, it tries to work its mojo on him, and he No Sells it with barely a glance.
- While it doesn't have a will of its own, Denkoumaru from Doraemon is a katana that comes with an AI and radar to determine the moves needed to defeat the holder's opponent(s), and carry out those moves by taking control of the arms of the holder. See how◊ Doraemon makes one of the Big Damn Manga Big Bad fall into trouble literally single-handedly with this katana while making some Exposition without even facing towards said Big Bad.
- In Guyver it's largely indicated that the Guyver units affect the host's mind causing them to fight and kill with a greater, more vicious brutality. This is a large plot point of the second live action film when, with no Zoanoids around to kill the Guyver has taken to hunting down and slaughtering regular human criminals with the same savagery it used on the powerful genetic mutations to the point that Shawn no longer feels he's in control and tries to get rid of the armor.
- The manga (and subsuqent anime adaptions) show the Guyver units to have something of an auto-pilot mode that kicks in when the unit is first installed, regenerates its host from the core medal or if the host suffers catastrophic head injuries. Its a brutally efficient fight, at least compared to Sho early on but its lack of nuance in dealing with what it perceives as threats leads to tragic consequences.
- Flame of Recca: weapons created by the bloodthristy Kaimon are hard to control at best, and can tend to have minds of their own.
- Derflinger in The Familiar of Zero has the ability to turn his user into a puppet when they are unconscious.
- A rather ambiguous (and positive) example in the climax of Magical Girl Lyrical Nanoha StrikerS provides a somewhat more physical example than most: during a fight late in the show, Subaru is momentarily given a Heroic B.S.O.D. in the middle of a battle. Her Intelligent Device, Mach Caliber, is a pair of rocket-propelled rollerblades linked to a Power Fist on Subaru's right arm, and proceeds to briefly fight for her by firing its various jets to maneuver the three limbs it can control.
Films — Live-Action
- The end of Stardust contains a subverted example. When the witch Lamia controls Septimus' corpse she only bothers with animating the sword (and hands/arms), letting the body dangle behind it.
- RoboCop (2014). When paired off against an ED-208 in the simulator, the cyborg protagonist Murphy turns out to be several seconds slower as his reflexes are affected by human decision-making processes. Under pressure from his boss to get results, Dr. Norton writes Murphy's software so that it takes over in combat situations, while signals are sent into Murphy's brain giving him the illusion of controlling events.
- In the Heralds of Valdemar series, Need does this when carried by a woman without sword skills. Regardless of their skill, she also has a tendency to force her bearer to protect any woman in danger... even if the danger is caused by her attacking Need's bearer! This gets better when the spirit inhabiting the sword wakes up fully and is able to direct her actions rather than just acting on instinct.
- In The Woman Who Rides Like A Man Alanna's crystal sword is empathic but not sentient. It is imbued with magic which amplifies violent tendencies. Several times Alanna is almost killed because she has to stop mid-fight to prevent it taking over and forcing her to kill someone she'd rather just scare off.
- Stormbringer, the black runeblade wielded by Elric of Melnibone in the novels of Michael Moorcock, was an Empathic Weapon with a curious and sometimes hostile relationship with its owner — forcing him, on one occasion, to kill his lover after battling to rescue her.
- In the end, it turns out Stormbringer was never really a sword in the first place. It was actually a powerful demon disguised as a sword that used Elric to destroy and recreate the universe, leaving it as the supreme evil power in the new one. It "rewarded" Elric with a quick death.
- Kring from the first Discworld novel, The Colour of Magic, is a talking sword who is not so much "empathic" as "annoying", leading at one point to Rincewind being forced to save the others because otherwise Kring would kill him.
- Men at Arms features "The Gonne", a firearm that takes control of the mind of its bearer to the point that it aims and fires itself even though the marksman tries to resist it.
- In a non-sword example, necromancers (and Abhorsen) in Garth Nix 's Old Kingdom series need to be careful when using the bells. They are implied to have minds of their own, with particular ones are prone to using a moment of inattention to sound or create their own pattern, often to the wielder's detriment.
- Fred Saberhagen's Book of Swords
- When its wielder was fighting a dragon, the sword Dragonslayer would guide him to strike the dragon's most vulnerable spot for massive damage.
- Shieldbreaker and Townsaver also have this ability, taking control of their bearer's bodies during battle and directing them, but also not letting them stop until the battle is over.
- In Portlandtown the Hanged Man's red-handled Colt Walker makes anyone holding it want to use it.
- The titular swords in Diamond Sword, Wooden Sword have a similar effect: they affect and take over the mind of the character who wields them, turning them into bloodthirsty racists. The elf slave Agatha, who wielded the Wooden Sword, killed her former kinda-friend Trosha without a second thought, because he was one of the Human oppressors, and later regretted that greatly. Apparently, it only works on natives of Mel'in; Clara Hummel used both at once with no ill effect in the grand finale of the series.
- The third sword, the Rain Master's Flamberge, doesn't force a racist personality on its user; it is an equal-opportunity misanthrope.
- The titular swords of Tad Williams' Memory, Sorrow and Thorn trilogy are clingy Empathic Weapons. Due to the unique magic that went into their creation, they are practically living beings, with the ability to perceive and influence the people around them. At the height of their power, they can compel absolute obedience from their bearers.
- The sword Nightblood in Warbreaker has a hypnotic effect on those who get a good look at it, making those with impure hearts fight over it while innocents are repelled and horrified. When someone with an impure heart tries to draw it from the scabbard, it takes them over and makes them attack any other stained souls nearby, and then when it runs out of targets it makes the wielder stab themselves.
- There's also the eponymous weapon of Lawrence Watt-Evans's The Misenchanted Sword.
- The sword Sikanda from The Neverending Story is a benevolent example. Given to whoever can name her (i.e. a human from outside Fantastica such as Bastian), Sikanda jumps out of her sheath into the wielder's hand when the time is right, such as in defense of her owner, and moves with unmatched expertise. You can take her out at will, but it is not recommended...
- In The Night's Dawn Trilogy, "Combat nanotics" are a suite of advanced programs downloaded into the user's neural cybernetics, which are used in combat to vastly enhance the user's reaction time and automatically strike at the enemy target, turning even an unskilled (but strong) combatant into a whirlwind of death. They can be configured to automatically engage when the user is threatened.
- Blue Öyster Cult's Black Blade, based on the Elric saga above, is this in spades:
I have this feeling that my luck is none too good
This sword here at my side don't act the way it should
Keeps calling me its master, but I feel like its slave
Hauling me faster and faster to an early, early grave
- Intelligent items in Dungeons & Dragons and Pathfinder have egos that can override their wielders' minds if the item disagrees with their actions. For example, Pathfinder's Briar Blade was created to defeat invaders from the First World and will fight its owner for control if the owner gets too friendly with Fae creatures.
- The Elder Scrolls has a sword called Umbra that borders on Eldritch Abomination. It grants great powers to anyone who picks it up, but the wielder is inevitably driven mad by the blade, eventually taking on the name Umbra for themselves. Some of the licensed novels take this Up to 11, where Umbra is responsible for some Nightmare Fuel levels of genocidal rampage. There is even some indication that it is capable of influencing Daedric princes.
- In BlazBlue, Noel's Arcus Diabolus: Bolverk apparently does most of the fighting for her, as well as suppressing her emotions to some degree. Something of a positive example; it was helping her keep her Omnicidal Maniac tendencies in check - when she loses them in the first game, she breaks down in tears and when it happens in the second (along with a little Mind Rape from the Big Bad) she becomes Mu-12. Averted by the time of the third game due to controlling Mu and Bolvrek being broken and rebuilt.
- In Mega Man Star Force, the wave energy alien Omega-Xis lives inside Geo's Transer (a wrist-mounted comm device). In one scene Mega drags Geo's arm around to approach someone, while in another he uses Geo's arm to punch out a guy bothering him.
- Sora's Keyblade in Kingdom Hearts is implied to be some form of this, at least initially: one of the villains states that "the boy's power is not his own" and he uses it both for combat as well as casting magic spells.
- In the Soul Series, Nightmare is the avatar and wielder of the cursed sword Soul Edge, which possesses everyone who wields it.
- Variant in Guilty Gear. Eddie, Zato-1's weaponized Living Shadow, possesses its master's dead body after he passed away before XX. The character is now referred solely as "Eddie".
- Dies Horribly's Artificial Arm in Goblins can shapeshift into a Blade Below the Shoulder whenever Dies gets scared (which happens pretty often)... or it can take complete control of his body and do the fighting for him if he's in real danger. The arm's personality is both fiercely protective of Dies (considering him to be its "Father"), and murderously jealous of Dies's Love Interest, Saves-a-Fox.
- In a Penny Arcade "Cardboard Tube Samurai" strip, Tobun's cursed sword drives him to slaughter even after he shoves a dagger into his skull to try to stop it.
- The intelligent Morph Weapon Blackshard in Digger sometimes takes control of Komiyan's body to use itself more effectively in battle. It's the first sign that Blackshard is actually a Leaking Can of Evil for a powerful Body Surfing spirit who wants to possess a proper body.
- From JourneyQuest, The Sword of Fighting is particularly unimpressed with Perf's cowardice and lack of skill. Several times, it actually forces him into situations, at swordpoint...
- Happens briefly in "The Lost Episode" of Acquisitions Incorporated, when Aoefel picks up a cursed sword and fails the Will check to resist its influence (which directs him to slaughter his friends with it). Luckily, he rolls better on the later checks and manages to get rid of the sword before doing any real harm.
- The red chalk from ChalkZone. Unlike the normal white chalk, red chalk seems to see creators as just tools for it to wield and seeks to dominate anyone who uses it, making them do what it wants. It will then gladly turn on any creator who attempts to go against what it desires.
- Rick and Morty features a variant where Rick (a mad, amoral genius with Super Science) injects his meek and timid grandson Morty with the "memories" of a severed arm from a warrior in your typical post-apoc Mad Max parody world. Morty's arm grows large and strong enough to push Morty around on the ground and go on an absolute killing spree in the local Thunderdome parody before becoming Morty's Loyal Phlebotinum Warrior Therapist, all without saying a word. Based on the size of the arm, its previous owner must have been immense.