Final answer:
Samuel plays the role of transitioning Israel into a monarchy and is a judge, prophet, and priest.
Step-by-step explanation:
In the biblical book of Judges, the role of transitioning Israel into a monarchy and serving as a judge, prophet, and priest is played by the figure of Samuel. Samuel was a central figure in the early history of Israel and played a crucial role in anointing and guiding the first two kings of Israel, Saul and David. He also served as a prophet and priest, delivering messages from God and conducting religious rituals.