I know there are lots of Midgardsormr threads in the lore forums, and I've read a lot of them but not, I think, exhaustively. So apologies if I bring up anything that's already been discussed. Please point me in that direction if that's the case. I have many questions, but I'll start with just the one for now (maybe sneak another in if I get carried away).
Midgardsormr and Hydaelyn have a covenant. That's clear from our first 'conversation' with him, and he refers to it on at least one other occasion, after the scene with Tiamat. I think - but I'm not completely certain - that at least part of its obligation is that he doesn't harm us. I've pretty much made the assumption that the covenant dates from his arrival on Hydaelyn back in the year 'dot' (someone - I think it's Tiamat - calls it a time before time); the Mother offers him a place here in exchange for ... something. My reasoning for this is to do with his connection with Silvertear. There's clearly a long-standing association between the dragon and the lake/the falls which is given a mythic explanation in Professor Erik's account of Althyk and Nymeia. That it is a 'myth' is pretty plain when Erik states that Midgardsormr came into being at the same time as 'the water' did, something we know isn't true. Unless Midgardsormr is lying about his origins. If he isn't lying, then surely only something cataclysmic could have driven him to fly through empty space with his precious clutch of eggs? I've inferred from that - I do a lot of inferring - that he's searching for a refuge, somewhere new to start over, and Hydaelyn offers him exactly that in exchange for ... what? His help against Zodiark? His guardianship of the planet's aether? His agreement to help and support her Champion at some point?
Do you agree that their arrangement is this long- lasting or do you think it's more recent? What is he likely to have agreed to? What is she likely to have granted him, if not a home here? At the end of the scene with Tiamat and the warning she gives about the dangers of the Ascians, he offers to lend us his wings. And then he says 'we go to the fight the Darkness!' Or something like that.
So he's more than the 'men are vile, dragons hate them forever' obsessive that Nidhogg is? He sees and accepts a bigger purpose?