Why does Ysayle want to protect Nidhogg? (spoilers)

[Februs]

I dont understand your point, the conflict with the allagans and the dragonsong war happened long before even the gearleans showed up on the lake. He simple wanted to stay on a neutral position and not involve on their sons's issues

You lost me. What point?

I didn't say his dormancy had anything to do with either the Allagans or the Dragonsong War. His injuries didn't either. Also, before his time recovering on the Lake, we have no information whatsoever about how he regarded his children or what his role in the conflicts were. The only thing we know for certain is that he was the guardian of a place called "Silver Tear Falls" before he was killed by the Garleans. Other than that, there's not much to go on about his attitude.

If anything, the only past information we can go on is his dialogue with the player after we fight him, in which he seems to sympathize with Nidhogg saying : "We do not forget. We do not forgive ... Seven children did I sire. One now singeth of retribution. I rise to join the chorus." Though, since then, his attitude seems to have changed dramatically. Based on how he is acting now, he seems much more apathetic by comparison.

As for why he spent so much time on the lake, I said that I assumed he stayed dormant wrapped around the Garlean Flagship Agrias because he needed to hibernate and recover his power after the ship exploded and took his body with it... but I'm not sure if that's the "point" you were talking about. I wasn't really making a point so much as stating a fact. There's a cutscene that shows his "death," and, after he wakes up, he assumes a tiny form while he gathers his powers again. This is pretty common knowledge as it all happens on screen.

[Frederick22]

snip

I think that before, he didnt trust us, and saw us like any orther ignorant mortal. But now we have passed his trial, he seems to trust on the WoL and show his respects.

[Februs]

I think that before, he didnt trust us, and saw us like any orther ignorant mortal. But now we have passed his trial, he seems to trust on the WoL and show his respects.

It would seem so. I think he wanted to confirm with his own eyes that we were worthy of Hydaelyn's blessing. His witnessing of our actions, and our Trial against the Knights, seems to be what swayed him to our cause. I do wish that Middy had played a more active role in the plot though. He only has a couple notable appearances throughout 3.0. Given that he was with us the whole time, I kinda wish we had more of him in cutscenes and whatnot; though, it's good enough to know that he bore witness to the events.

[Kaiser-Ace]

It would seem so. I think he wanted to confirm with his own eyes that we were worthy of Hydaelyn's blessing. His witnessing of our actions, and our Trial against the Knights, seems to be what swayed him to our cause. I do wish that Middy had played a more active role in the plot though. He only has a couple notable appearances throughout 3.0. Given that he was with us the whole time, I kinda wish we had more of him in cutscenes and whatnot; though, it's good enough to know that he bore witness to the events.

I believe the devs said at some point we'd be getting some answers to Middy's purpose as Lake Guardian, His Arrival in Eorzea, and his Relationship with Hydaelyn through out the 3.x story cycle.

That may help fill in some of the long standing mysteries about Midgardsormr.