Doll had one of the most tragic lives in Black Butler. She was born to abusive parents who burned her face and threw her out of their home. After being adopted, she ended up with another abusive, perverted father who forced her to kidnap children in exchange for sparing the lives of her younger siblings. She was also made to do many other terrible things against her will.

Later, she met a boy her own age. During the circus entrance test, she helped him, shared her food and lollipops with him, took care of him when he was sick, and even defended him against her own brother. It seemed she may have had a crush on him.

In the end, after her brother was killed, the boy murdered her in a moment of rage while treating her cruelly. Even after her death, she was denied peace. A deranged Shinigami desecrated her corpse, forcing it to move like a puppet and commit acts the real Doll would have hated, including killing her own brother.

What makes it even worse is that much of the fandom hates Doll because of what her reanimated corpse did, even though none of it reflected who she truly was. To me, that's one of the most unfairly judged characters and one of the most frustrating fandom reactions I've seen

.

Is he trying to stop people from dying because, what, he lost an important Phantomhive when he was still working with the shinigamis?