What she did was basicly she studied pharmacy but she decided to become a drug dealer right?
I know her reasoning was to get her dog back, i think, but thats the same as the drug dealer dealing drugs so that he can gain the love of someone yeah?
Anyway i think the morality of necromancy depends heavily on how it works,
do the undead work like golems and have no soul,
is the soul of the dead people used,
do they feel pain,
do the corpses need to be fresh,
is there a god that dictates whether graves and the dead are sacred or not,
did the people consent before death,
is it a war,
how many undead are you raising,
for what purpose,
is necromancy more like the study of souls,
can necromancy be used to fully resurrect someone,
do the undead need to be human,
do you need corpses or souls of the dead to make an undead or is it like summoning,
do undead affect the world/air/enviroment/populace in a negative way,
what is the situation you are using it in,
do souls fade after death,
do people used for undead understand their situation,
do undead die from the sun or from touching some kind of holy object/liquid,
what classifies as undead? zombie, skeleton, ghoul, vampire, slimes, golems, gargoyle, demon, chimera?
I think there are alot of factors that decide whether necromancy is morally ok in my eyes but i will trust that the manga knows that necromancy is kind of morally ambiguous
Though i agree that she was a bad person doing bad necromancy
God damnit i went on a rant again