@Graviator do you like where I put the Concert Titan?
I apparently never answered this in thread until now.
The Isle of Storms is probably the only place it can exist as of story start, assuming the isle is large enough to support it.
The part that's subtly wrong is its reasons for not wanting to take up the Storm Titan's mantle. Its power source is adventurers, and while the Storm Titan can spend years trying to explain how dangerous a Grand Dragon is, that only convinces the Concert Titan that it shouldn't let its groupies anywhere near one. While it might be willing to fight a Grand Dragon should one show up and strafe a concert, and might even come out on top with some nasty sonic attacks, the impact of such a fight on its fragile resource base would be so severe that it thinks it could only do so once.
Also, even if the Concert Titan could adequately shelter its entire audience, it is nowhere near mobile enough to defend the whole island. It relies on
bicycle couriers to scout adjacent villages.
The desire to look for a peaceful solution where possible is genuine, as shown by the adventurers that are part of its own defenses, but it's not its main objection to the Storm Titan's proposal. I can only conclude that the Concert and Storm Titans were completely talking past each other for that entire year-long debate.
E: If nothing else, the Storm Titan likely did convince it to research some last resort anti-Grand-Dragon weaponry.
