The Journalist/Narrator in Ace Combat Zero is kind of an idiot.
Warning...SPOILERS
So he spends the entire game trying to find out about Cypher, the DEMON LORD OF THE ROUND TABLE AKA the Player character and to this end, interviews a bunch of other pilots who fought in the same war with him(Often on opposing sides). Foremost among those is Larry "Solo Wing Pixy" Foulke, who was Cyphers Wingman and "Buddy" and ends up being the final boss of the game. At the end, the Journalist ends up learning absolutely nothing about Cypher because Cypher is a nameless, faceless Mute who happens to be really fucking badass in an plane and meant to the player Avatar(but might as well be a Camera flying a plane for all it matters). Cypher just appeared from nowhere, became super famous and won the Belkin War almost single handedly and then just vanished into thin air never to be heard from or mentioned again(Unless you maybe count one easter egg in Ace Combat 6). At the end, the Journalist says maybe Cypher never really existed.
In the meantime, said Journalist gets to interview Pixy, who is a far more interesting character then Cypher is(and not only because he actually IS a character). He's a Belkan Mercenary who ends up fighting against his own nation in the Belkan War, is every bit as good and badass a Pilot as Cypher(apparently the Solo Wing Nickname comes from him having once landed an F-15 after losing a wing), Helps win the Belkan war before becoming so distraught by both the Firebombing of Hoffnung and the Belkans Nuking themselves out desperation that he defects to a terrorist organization that wants to "Reset the World" by Nuking it and in the end, almost succeeded in doing so(and making him a War Criminal in the process). Osean Journalist doesn't seem to care about that, considering he doesn't seem to think getting to interview Pixy is that big a deal and because he's still pining after Cypher. Hell, all they'd really need to do is having the journalist say "I Came to find out about Cypher, but since the man is a fucking ghost and realized Pixy is far more interesting and newsworthy, I'm gonna make this story about him instead".
Arguably, Pixy is the Main Character of the game, he's just not the POV character.