Agency (n.) is always hybrid and distributed... it is the actant formed by the alliance between gun and shooter that kills people.
Agency (n.) is an emergent property of the total system. That is, agency is not expressed at the 'nodes' of a network, that is, only by the actors, but rather as transformations that result from the interaction of all the actors in a network.
Agency (n.) is better termed 'actant' where a set of circumstances occurs through which a person acts.
Agency (n.) is not a property of individuals but a function of relations, circumstances, interruptions, interlopers and cascades.
Agency (n.) is the effects that an entity (technology or person) brings about in the networks.