as to reading Lludara
First for stabing I rather see it as mother overcoming fiery at some moment and kind of frowing herself on the pin. It is more rational in a way that nobody will feel guilty after. Not to mention it will put her with better light at the end as to this point she was portraited as ravenge obsessed woman who abonded her child (give him away and did not look after him when he was with her anyway).
Second, no way they reincarnate them all and put as one happy and memory deprived family. There was hint about Magistrate being prepared to be new Shinigami so this is one possibility, second he remains as he is.
For fiery she rather die and I will not be surprised if her lover/brother die as well (how long was this knife? Can go through both?)
Young Master do not have any reason to protect Arang with his body as she is not supposed to die anyway, and process of possesion do not include stabbing or any other damage to body. Ok he may die in strugle to take her out but that's all.
For Arang that is the most difficult to predict. There are two possibilities, just show that she is leaving her body (and leave heartbroken audience
) or give some hints about reunion. Well 3rd possibility is to let her stay by electric shock to heart
but usually Gods are not so nice, I think My Girl is Guminho was only exception.
But how they are going to drag it through 2 more episodes I have no idea.
Well, they did not disappointed me much so far so I am going to belive there is enough plot left.
Her being ghoust just gave more possilities, in fact I was surprised they gave it up so quickly. Body was needed for pseudo love triangle and to move oponents of course but added restrictions on character. Her changing has some logic as in fact she is still the same person and lerning about herself in process, we can even argue that she on deep level start to remember, not memories but behavior. And interactions with people around her make her change as well when she do not need to fight on every step anymore (her life as a ghoust was not easy one). Question is of course what theory you belive: we are predetermined in out character or it is build during process of growing? The answer is in between I think.