The general Nivemus view of Sirion is that they are an overcontrolling Toddlers in Tiara's type Mom that want may want us to be their puppet, but to hell if we are going to be that. The general feeling is they don't give us near enough respect and only decide to consider us a sovereign nation when it is convenient for them. That is the general feeling, not necessarily my viewpoint.
And to answer the question: We view ourselves as a new, sovereign nation that is full of a melting pot of people looking to bring together the lands of the North. Some of these nobles are former Old Rancaguan members, former Fontan members, former Sirion members, and still others from other parts of the continent looking for a new life and adventure in Nivemus. We want to be good friend with Sirion and Fontan, but a friend of them. Not a lapdog for them to abuse. We are our own nation, after all.