The Interactor is designed to create interactions (in seconds) that involve body motion with or without any animation files. Work with your own IK, but there are also one touch switches for final IK integration.
The Interactor is designed to cover all aspects of any type of interaction, from the design phase in the editor to dealing with complex interactions at runtime. It contains editor tools to simplify the process of preparing a fully interactive environment (see the "Simple Workflow" section below). At runtime, it handles which parts of the player will interact with which parts of the interactive object, while using its own IK to animate the player's bones.