A robot includes a tractor, a walker, an input device, and a controller. The tractor includes a connector and pulls a user through the connector. The walker includes wheels for moving the tractor and one or more brakes for the wheels and is coupled to the tractor. The input device receives an instruction to operate at least one of the tractor and the walker. In response to reception of the instruction by the input device, the controller determines whether or not to permit the tractor and/or the walker to perform a process based on the instruction, in accordance with a current state of the robot, the current state being one of a plurality of states of the robot. Each state is represented by using values of items, one of the items being an item indicating whether or not the one or more brakes are applied to the wheels.