שלום! I am the מלך ישראל and this is my right-hand man, the נביא.
I am the נביא, directed by 'ה to be the personal advisor and מוכיח for the King.
In Jewish history, every King had a Navi at his side: Shaoul had Shmuel, David had Natan, Achav had Eliyahu, and more. According to R' Yosef Dov HaLevi Soloveichik, history demonstrates that a King in particular--a person of great stature and honor--needs someone to watch and rebuke him when necessary,
My job is to give over my תוכחה with the sensitivity and respect that the King deserves, as befitting my role as a חוזה. Anyone can be a רואה and give rebuke according to what he thinks is right, but my words are said בשם 'ה and come straight from G-d, and thus the King accepts it differently.