A collection of toggles, sliders and some custom nodes if applicable, for creating and re-creating simple character controllers in a much easier way than coding, for quickly prototyping and possibly even finishing games where you do not need much more than yourself and maybe some signs or NPCs to talk to.
Ideally, all the toggles and sliders would determine speed/s for walking and sprinting, jump height and behavior, fall damage and a curve or two for determining how it is calculated, 1st and 3rd person, as well as if this would be available to toggle for the player, all those kinds of things...

Some nodes could throw data at the dev, for plugging into or using in an interface.
Other nodes would allow the entering of special vehicle objects, or the switching to a vehicle kinda object.
No animation needed, but clearly commented areas where data relevant to animation would be, similar to the interface data. Speed, direction, duration of action, nearest ground planes on a grid, nearest wall or other object that you may want to have the player character brush past assassins creed style...

Open to things such as climbing, TOTK/BOTW/SOTC style, perhaps some wing cap style flying and so on, perhaps even death stranding style advanced walking gameplay