The First Brood and end game Endwalker spoilers ahead....

[Nekaru_Infitima]

That's probably it. Given what we now know about their star, their attempts at going to other stars to be destroyed, and finally coming to ours...

Can you imagine the love Hydaelyn must have gave to Midgardsormr and had for them all? As Venat she knew what was happening acorss the universe from Meteion, she heard the reports of the hopelessness of other stars and so when Midgard came to her, I can just imagine it was instantly with open arms to accept a race of beings who were devoid of hope and had nowhere else to turn because of what was unleashed from her very own home.

Then the war where they were once again devoid of hope to finally make amends and allow this race that was near extinction to finally have a chance to repopulate. (much like IRL conservation efforts for species).

I don't know, it makes Midgard knowing Hydaelyn and making a deal with her so much more powerful, in that we now know Venat's personality and history, and the dragons exodus.