It quickly becomes clear when studying character Enneagrams that a disproportionate number of protagonists, especially male ones, are Nines. It starts to get a little tedious, actually, to always say, “Oh, look, a Nine again.”
Harry’s a Nine.
Man Nines come in two shapes: extremely heroic, muscular, tall, athletic (you can see why writers would favor a Nine protagonist); and lean, medium-height, and quite prone to wear a beard.
Yeah, that seems strangely specific, but it is a consistent observation.
Harry is the latter. (Minus the beard, of course. If he were to ever be portrayed as a man, the characterization wouldn’t be quite accurate if they left off the beard.)
His ability as a Seeker suggests Body Type. His diplomatic friendship with everyone except his most hated enemies is Nine-ish. His passive nature through his younger years at the Dursleys is classic Nine-avoidance of conflict. And his heroism — he doesn’t particularly agonize or fret, he just steps up — have that placid Nine confidence.
Nines are very likable, which makes them so suitable as a main character. They can veer off into boring, though, so keep a tight leash on your writing. Don’t get them started on an anecdote; they’ll talk forever.