ENFJ and ENFP are the two warmest extroverts in the system and are constantly mixed up, including in the search results for "campaigner vs protagonist". The letter that differs is J versus P, and it decides whether your warmth arrives with a plan or with a spark.
ENFJ organizes people toward something; ENFP lights people up and sees what happens.
The only letter that differs is J versus P.
This pair means strong E, N, and F with a J/P score near the middle. Responsibility for other people usually tips that axis toward J, which is why many people test ENFJ when they are leading and ENFP when they are not. Both results describe the same warmth in different roles.
Yes, when your J/P score is near the middle. Notice where the planning side switches on: for many people it is whenever they are responsible for others.
Yes. Protagonist is the nickname used for ENFJ and Campaigner for ENFP.
ENFJ leads more often by default, because organizing people is its natural mode. ENFP leads by inspiration when something matters and steps back when it doesn't.
The four-scenario test scores each area of your life on its own, so instead of one label you see where ENFJ shows up, where ENFP does, and which letter is doing the moving.