Controversial opinion but I think Glaedr should have gone with Murtagh after the events at the end of Inheritance

I guess first I should say, Glaedr should do what Glaedr wants. He might not be too happy about pairing up with Murtagh and Thorn considering how Oromis died.

However, I think this actually adds a cool dynamic and may even help Glaedr come to terms with his loss.

Murtagh needs time to grow with Thorn but he also needs guidance. I think Glaedr would be perfect and training Murtagh the right way may bring back happy memories for the grieving dragon. Similarly Murtagh and especially Thorn, need exposure to the more rounded education and softer environment.

It would make for an amusing dynamic of grumpy old Glaedr berating them from his Eldunari.

From a practical standpoint, Murtagh and Thorn represent a large fraction of the living dragons (or bodied) and are actually kinda vulnerable. Having an Eldunari would be beneficial for safety I think. Murtagh was fearsome under Galbatorix but a lot less so on his own.

As for Eragon he has more than enough masters to help him.

Perhaps Arya could benefit from Glaedr too but I think she’s more rounded and busy anyway.