1: Eragon learning how to fight with sward. Also with magic.
3: Glader helped eragon and saphera learn to use magic and taught them to fight.
5: The Eldunari that Glaedr gaive to eragon to keep safe. And away from the evil king which is trying to kill Glaedr and Ormis
7: Thorn which is murtags dragon and he is evil at first but then he changes to the good side.