Background
According to the pilot, she had just completed a local flight with a passenger and was taxiing toward the terminal when a person on the ramp, adjacent to the taxiway, approached the airplane from the left (pilot's) side.
Conversation and Sequence
Upon the person's approach, the pilot stopped the airplane, idled the engine, and had a brief conversation with the person. During the conversation, the pilot agreed to embark the person after her current passenger exited the airplane, and to take the person for a short flight. While conversing, the person was located aft of the left wing strut, and the pilot's door was open.
Spectator Accounts
Several spectators, who were observing the activity from the ramp area, reported that after the conversation with the pilot, the person turned to wave at them, and then walked into the propeller.