The Interview Intermissions are more of an insight into a certain character's... character than they are really relevant to the story. You get little tidbits from them you might not have known before, but otherwise, not much.
I won't post them (though I have them, yes) because that would be a wall of text and is kind of off-topic, but the characters that have been interviewed (in-game) to my knowledge are: Arc, Aya, Bennett, Hardy, Kiki, Luna, Radomus, Samson, Shade, Terra, and Titania.
...The last of those, though, "politely" declined to be interviewed. And there was a grudge held for the next like, two or three interviews because of that, amusingly.