@Exile, I have to correct a couple of things in what you mentioned:
Lovisa did not summon the ghost simply to ask him questions. From the looks of it, she asked those questions to make sure that the summoned ghost is the one she intended to summon, and then to make sure that the soul has settled inside the body.
Also, on the Chimera retaining Magnus' personality, I think Leafa is reading too much into what happened. That Chimera is strictly following the orders of Lovisa (see image 32 panel 3 for example).