A trusted poster on GAF gave his non-spoiler (with some slight spoilers lol) of the game. On this page. Its very extensive and super hype worthy: http://www.neogaf.com/forum/showthread.php?t=1316451&page=30
. He says he's not the open-world type and that his exploring the world is different than usual (he would complete some side-quests, but he was mostly about sight-seeing), so he doesn't give much away about NPCs, apart from noting who the stronges outside of the four is and that supporting characters add flavour and colour to the world (and this is, first and foremost, a Noctis game). Nothing on Niflheim's bosses .
. He says he's not the open-world type and that his exploring the world is different than usual (he would complete some side-quests, but he was mostly about sight-seeing), so he doesn't give much away about NPCs, apart from noting who the stronges outside of the four is and that supporting characters add flavour and colour to the world (and this is, first and foremost, a Noctis game). Nothing on Niflheim's bosses .