Equippable Ally/Playing With

Basic Trope: A character who can be wielded like a weapon by another.

Straight: Bob uses a gun known as an AL1C3 Rifle which has an intelligent AI assistant built in.
Exaggerated: Bob's friend Alice can transform herself into a BFG when they need to fight.
Downplayed: Empathic Weapon.
Justified: Alice's gun form is much more powerful than a conventional firearm.
Inverted: An all powerful wizard stops Bob shooting him by turning his gun into a person (because when he's that powerful it's a matter of defeating his foes in as flashy a way as possible).
Subverted: The human form of "Alice" turns out to be a hallucination. Bob's gun is merely a Companion Cube.
Double Subverted: It turns out that this "hallucination" was actually his gun's AI reaching out to him, having achieved true sentiance and becoming a Projected Man.
Parodied: Alice turns back while Bob's still holding her, leaving Bob holding something he really shouldn't. Alice is not amused.
Deconstructed: Alice has serious qualms about serving as a weapon, feeling that she has very little control or input during fights and because of the ethical implications of being used to kill people.
Reconstructed: Until Bob explains to Alice that they're a team and he'd be nothing without her.
Zig Zagged: Alice is implied to have some connection to Bob's gun, but it's not made clear if she actually transforms into his weapon or merely carries it for him and finds somewhere safe to hide.
Averted: Weapons are purpose-built devices or the natural weapons of the combatant.
Enforced: "Hmm, Bob would be a bit dull to watch if he was on his own. Make his gun turn into a hot chick or something."
Lampshaded: "So does Alice report to a sergeant or a quartermaster?"
Invoked: Bob decides to find a weapon which can act as a pet or a partner. Because being a soldier is lonely.
Defied: Proposed experiments to create Super Soldiers who can turn into weapons are laughed out of the boardroom.
Discussed: "Huh? Where did Alice come from?" "She was his gun a moment ago."
Conversed: "Hm, it's lonely out here in the field. Wouldn't it be great if I could have a conversation with my gun or something..."
Played For Laughs: Alice gets angry at Bob when he accidentally holds her wrongly and objects to being sheathed or placed in a rucksack (which Bob still does while he gets used to the idea of a gun which can go on strike).
Played For Drama: Alice is injured in the field, leaving Bob stuck in enemy territory, unarmed and with an injured companion.

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