***Spoilers***
After beating Alexander and doing all the CS's to get the crown and ring, i spoke with a few NPCs and got different messages from normal, and they only said it once. Even if i zoned and came back they didn't repeat it. I've only spoke with 4 NPCs. Abquhbah was 1st, then the taru @ North port in whitegate who gives the ToAU42 item (forgot name), and then Naji in Metalworks. Abquhbah spoke about my debt being incredible. the Taru said something about not being invited to the ceremony for the Princess, and Naji says something about the Light of Alexander. I then spoke with Shantoto but didnt get anything new. Was j/w if there may be a possible mission/quest after beating ToAU, similar to Bahamut and Apoc Nigh. And maybe theres NPCs we have to talk to first. I dont know if people can search .dats for this, im on PS2 and got no idea how you even do that on PC lol
Edit: I also talked to the elvan guard in ru'lude gardens in the room where you get the airship CS and sent to wajaom woodlands. He said something too but i forgot, been a few days since i talked to him.