Guiltythree
She's forcing everyone out while making it seem like it's their choice. But if any one stays they won't be able to defend the castle. I'm willing to bet if she thinks Sunless will get in her way she will stab him in the back. figerally and literally. She is chaining them to her that are invisible. Bit Sunless can see them so he is a threat to her.
Can't say I agree, the truth is simple, without action all of them will die maximum within a few years. They can't defend the castle for long, even all together if they didn't try to escape, without reinforcements being sent every year. Their choices are do nothing (die), try to escape the nightmare (highest chance is do it all together and band together with the strongest person), or try to escape separately (probably die). Neph has the capability by working together with all of them to save some of them. Many will die, maybe even most, but I'm sure a lot of them would prefer to die fighting with hope and a chance to return to their home then just wait for the nightmare to kill them soon. I doubt there are many that when knowing up they're up against will think "this is totally safe." She is not underselling the death potential. She and everyone here has the power to grasp a chance to escape if they fight with their lives. People seem to be pushing some idea that Neph is heartless, but I don't really buy into that, especially when it comes to the people she cares for like Sunny and Cassie. But if it comes down to it, would she choose them over saving more lives, over destroying the spell? I'm not sure. If she ever had to make a choice and go against them, I have no doubt she would not take any joy in it. She is a true leader who knows that no great advancements can be achieved without sacrifices. Anyone can claim moral high ground and say no matter what I won't sacrifice lives of my comrades, but in reality in this kind of situation that is just foolishness and irresponsible moral grandstanding since that would lead to every single comrade dying soon. As far as we know there is only one way to escape and that way can only be pushed through by force and like Neph tells them, many are likely to die. She is being real with them, they can either spend their last bit of life here being trapped by the spell or fight and perhaps escape or die trying. This can be applied to a wider scale too with Neph and Sunny having never before seen potential in their world to perhaps save the entire world's population that remains. We've seen what happens in the long run of a world that falls victim to the spell (where they are right now). Her goal is not just to escape, it is ultimately to destroy the spell and the nightmares that have a grip on their world, and if she pulls that off it will save everyone. Does she have personal reasons like revenge for it? Yes. Does that make it any less important? I don't think so.