Final answer:
Specific clues indicate Benny as the first character presented in the flashback.
Step-by-step explanation:
In the given information, there are specific clues that indicate Benny as the first character presented in the flashback. The information states that as we proceed horizontally in the frame, we can see the transformation of Nicholas from infancy to adulthood, with Benny appearing as an adult in the top right hand corner.